From mystical elixirs and occult rituals to state-of-the-art medical advancements, the science of longevity has been studied for centuries — and now it may finally be yielding results. Humans can now manage chronic diseases and hack their physical bodies to defy the effects of aging.

Understanding how this became possible requires looking back. Learn which ideas have endured, which have faded, and which continue to shape the way people approach health and aging today by tracing the history of longevity.

Read on to learn about the perennial quest to outlast mortality, how virtually every culture across the globe has approached it, and what might actually work. 

Ancient roots of the quest for longevity

Ancient civilizations have long sought immortality, and revisiting these early roots offers insight into today’s trends in longevity.

Since most people in ancient times had a lower life expectancy than people do today, they often believed that conquering death would make them immortal and, by extension, divine, and therefore, they spared no expense in trying to do so. 

The following section examines some of these earlier efforts, as reflected in myths, legends, and cultural beliefs. They reveal how the roots of the modern longevity journey were planted, providing lessons that people have adapted and reshaped over time. 

Longevity myths and legends in ancient cultures 

One of the most striking and prevalent myths is the concept of the “fountain of youth.” Popularized in the 1400s and 1500s by Spanish explorers, it was believed that finding this magical substance could grant the consumer the ability to live forever or cure them of mortal illness.

In the Hindu religion, there are multiple references to a plant known as “Soma,” which was believed to grant immortality to whoever ingested it. Expanding on this, an entire branch of Ayurvedic medicine — known as “Rasayana“, or rejuvenation — aims to tackle the mysteries of aging, and is meticulously detailed in countless Ayurvedic texts.  

The Greeks were also renowned for their reverence for immortality. Ancient Greek myths frequently reference the “Ambrosia” and “Nectar” of the gods, which were considered food and drink that the gods consumed to grant them immortality.

The catch, as with all Greek legends, was that if one were to eat these foods, then they would be condemned to continue to do so for eternity, lest their life force fade away. 

Early medical practices aimed at prolonging life

As the mystical pursuit of immortality gave way to more practical approaches, ancient healers began to look inward — into the body, mind, and natural world — for answers to achieving long life. Across cultures, early medical traditions emerged, each offering its own philosophy of balance and preservation. 

Ayurvedic medicine

Ayurvedic beliefs take a holistic approach towards dhatusamya, or homeostasis. It was believed that adhering to core tenets could help maintain balance among the body, mind, and spirit. This was necessary for maintaining homeostasis and preventing illness. 

These comprehensive tenets were: 

• Diet. Taking care of one’s diet and eating mindfully.
• Sleep. Sleeping well
• Abhyanga. Regular oil massages.
• Panchakarma. Deep tissue massages.
• Mindfulness. Practices such as yoga and controlled breathing.
• Self-care. Keeping regular self-care routines for morning, midday, and evening. 

It is worth noting that most, if not all, of these practices are still recommended by modern Western physicians today, albeit with a more modernized perspective.

Traditional Chinese medicine

Traditional Chinese medicine also offers many perspectives aimed at promoting longevity and minimizing age-related decline. Traditional herbal remedies have long been used as they were believed to be potent anti-inflammatory agents, and therefore help people to live longer. 

Some of these herbal remedies are:

• Ginseng
• Turmeric
• Goji
• Astragalus
• Green tea 

Many studies in recent years have examined the use of extracts from these herbs and have actually found some evidence potentially linking their consumption to decreased mortality.

Similarly, many scholars during these times relied heavily on their limited knowledge of human anatomy and physiology to develop remedies for their patients. Many such remedies came from known medicinal plants. 

Greek/Western medicine

Hippocrates, who is regarded as the father of Western medicine, was one of the first to turn away from looking at the divine for notions of healing and immortality and instead looked towards the human body. 

His philosophy centered around the 4 body “humors” — blood, phlegm, yellow bile, and black bile — whose balance was key to maintaining good health, and imbalance would lead to disease. While archaic, his observations paved the way for scholars succeeding him, such as Aristotle and Galen, to expand on their explorations of human anatomy and medicine.

While these observations may have been primitive, they still provided early scholars with considerable insight into the inner workings of the human body and how its external environment can positively or negatively impact it.  

Cultural views on aging and the afterlife

The Ayurvedic practice as a whole does not view aging as a disease or a problem needing to be “fixed”, but rather as one of the natural processes of living, and eventually dying. 

Jara, or aging, is comparable to hunger, thirst, or sleep and is composed of 4 different entities that are affected by physical, emotional, metabolic, immune, and even psychic factors.

Similarly, the ancient Egyptians did not believe in physical reincarnation, but rather spiritual reincarnation. They thought that the person would either ascend into the afterlife if they had lived a good and moral life or completely cease to exist if they had been wicked.

This philosophy was rather convenient, as it also aligned with the fact that ancient Egyptians did not live as long as most populations did at the time; this incentivized them to do good in the years they did have.

Life expectancy through history

While many schools of thought on aging existed, often intertwined with spiritual and religious beliefs, most lacked any medical or scientific knowledge.

For much of history, people have faced numerous daily challenges. From being chased by wildlife to dying by the thousands from famine, the human race has overcome multiple obstacles to reach its current state.

These challenges shaped human life expectancy and influenced the ways people adapted in their pursuit of longer lives. This pattern is evident in the next section, spanning prehistoric, medieval, and even modern times.

Prehistoric and ancient life expectancy

Hunter-gatherer societies faced poor hygienic conditions, high burdens of infection, malnutrition, and ineffective medical practices; these challenges often meant high mortality rates for infants, specifically. 

Life expectancy for those who made it past infancy sat around the ages of 10-30 years, capping life expectancy to around 40 years for most. Interestingly, studies have found that around half of those who reached 20 were able to reach the age of 60.

This eventually enabled stable multigenerational support for younger people and thus the transfer of skills and experience. 

Additionally, tribes and villages coalesced into small towns and communities, and people were able to slowly navigate these challenges, to some extent. This newfound stability enabled communities to connect, trade, and thus thrive alongside others, leading to the rise of civilization as it is known today. 

Medieval era: Plagues and plateaus

People in the 14th century lived under conditions not dissimilar to those of their ancient predecessors, and life was far from easy. While written records are sparse, archeological data and historical accounts provide a grim image, with climate conditions that often led to crop failures and various famines. 

Most communities subsisted on herding livestock and farming, and relied on unclean water sources for their everyday needs. Much of the population lived in poverty and had extremely limited access to formal medical care, which was also not the best. 

This setting provided an ideal petri dish for all kinds of infectious diseases to wreak havoc, which they did. There were:

• Tuberculosis
• Pneumonia
• Smallpox
• Viral illnesses
• Dysentery
• Various gastrointestinal diseases 

All of which were omnipresent, and usually fatal for the common man who often had a compromised immune system, plagued by poverty, malnutrition, and unsanitary conditions.

It is thus no surprise that when the Bubonic Plague, also known as the Black Death, broke out, it had devastating effects on the populations of Europe and the Middle East.

While the numbers are not consistent, it is estimated that the Bubonic Plague killed between 25 and 50 million people in Europe between 1346 and 1353, wiping out almost half the population of the continent and nearly a third of the population in the Middle East.

Enlightenment and early scientific breakthroughs

After the Black Death, or Bubonic Plague, many parts of Europe struggled heavily to recover. However, throughout the hardships of that recovery process, some discoveries were made, though they would not bear fruit for decades or centuries. 

One example of this is the earliest microscope, which was created around 1590 by Hans and Zacharias Janssen, only a few years after the plague.

This led to the discovery of the “cell“, which is attributed to Robert Hooke in 1665, who used the term to describe the microstructure of cork. His contemporary, Anton Van Leeuwenhoek, had developed the strongest microscope of his time. This led him to explain, for the first time, microscopic structures such as bacteria, protists, and sperm cells.

The primitive nature of medicine at the time did not favor people, as most therapies relied mainly on herbal remedies and practices such as bloodletting to “treat” illness. It is also no surprise that most doctors, or rather apothecaries, were not accessible to most, as they were often too expensive for the layman, and so old wives’ tales developed.

Despite these antiquated practices, this era also gave rise to various medical discoveries and numerous theories that are still in use today.

The turning point: Modern medicine and the Industrial Revolution

During the Industrial Revolution, life expectancy began to rise for the first time in human history, thanks to advances in sanitation, medicine, and living standards. At that time, the average person could expect to live only about 32 years, whereas now someone born in 2021 might reach 70 or more! 

This remarkable leap reflects the transformation of people’s lives through technological and social progress, extending their lifespan. Largely due to the invention of technologies such as steam engines, telegraphs, and the “spinning jenny,” which was used for spinning cotton and wool, manufacturing became much more efficient.

This massive shift led to mass migration events from rural towns to industrial urban centers, bringing about significant socioeconomic, technological, and cultural changes. 

Medicine also underwent significant changes during this period, keeping pace with the broader transformations of the Industrial Revolution. Below are some key examples of how the revolution reshaped the medical world:

Vaccination and infectious disease control

As societies advanced, one of the greatest threats to human longevity remained invisible: the spread of infectious diseases.

For centuries, outbreaks of smallpox, tuberculosis, and other deadly illnesses devastated communities despite rising living standards. The realization that prevention could be more powerful than cure marked a new chapter in humanity’s pursuit of long life, as medical innovators began to turn the tide against disease and lay the foundation for modern immunology.

Variolation

Multiple texts describe a practice known as variolation. In what is arguably the earliest form of vaccination, variolation was widely practiced in Southeast Asia, specifically in Bengal, to prevent and immunize against cowpox and smallpox.

It involved taking scraps from the pustules of sick people and making powders from them to be inhaled, or even beaded amulets or bracelets, to inoculate healthy people and protect them from disease. 

The practice eventually spread to Europe, where smallpox had also been ravaging the population. Although it was not a foolproof method of achieving immunity, variolation had a case-fatality rate 10 times lower than smallpox itself, and even many of the aristocratic class relied on it.

Proper vaccination

In 1796, Edward Jenner performed the first successful vaccination against smallpox.

His success was a direct result of experiments conducted over the course of several years, following reports of milkmaids who had been immune to smallpox after contracting cowpox beforehand.

Regardless of the criticism and scrutiny he received from the public and even his peers, Jenner’s discovery was a key step that kick-started the vaccine boom of the following two centuries and led to the eventual eradication of smallpox in 1980.

Vaccine boom

Building on Jenner’s success, the success of vaccination sparked a global wave of scientific exploration aimed at preventing other deadly diseases.

Tuberculosis (TB)

Among them was Tuberculosis (TB), one of the most widespread and devastating airborne infectious diseases, with some of the earliest records of its existence dating back to the ancient Egyptians 4000 years ago, similar to polio. Often referred to as “consumption,” and “wasting disease” due to its catastrophic effects on people, tuberculosis was considered a sure death sentence for most of history.

While research for a TB vaccine had been underway since the early 1900s, it was not until many decades later that its efficacy was proven in large clinical trials.

This effort culminated in the development of the Bacille Calmette-Guérin (BCG) vaccine by French scientists Albert Calmette and Camille Guérin. It is the first vaccine to protect against tuberculosis, which remains in use today and has dramatically reduced global TB rates, especially in developed countries.

Among the most remarkable discoveries of this vaccine boom is the development of the polio vaccine.

Polio

Poliomyelitis is a highly infectious illness that disproportionately affects children. It can present with symptoms as mild as the stomach flu, all the way to severe paralysis and even death. It is an ancient illness, with records dating back to ancient Egypt. 

In the 1900s, Polio was a ubiquitous condition in the United States, with outbreaks occurring each summer.

It was not until the efforts of Jonas Salk in the 1950s that a vaccine was developed with astounding results; the rate of paralytic polio in the United States dropped from 13.9 cases per 100,000 people in 1954 to 0.8 cases per 100,000 by 1961. 

The development of the oral polio vaccine further suppressed this illness, and by 2002, the Americas, Europe, and the Western Pacific regions were declared polio-free.

Today, polio has largely been eradicated globally, with only a handful of endemic areas remaining, an estimated 20 million people who would have otherwise been paralyzed, and around 1.5 million lives saved.

Discovery of antibiotics

In 1928, the transformative effects of Penicillin, one of the very first antibiotics, were discovered in Alexander Fleming’s lab by pure chance.

The discovery of this drug at such a critical time transformed the course of medical science. It saved countless lives afterward by uncovering more organic-based medications and eventually synthetic ones as well. 

The first medicine discovered to have antituberculous effects was streptomycin in 1945. The success of this drug was short-lived, however, as resistance to its effects quickly developed. This was curtailed by the development of a drug known as para-aminosalicylic acid, which, when paired with streptomycin, was able to provide patients with a lasting cure. 

Within a few years, “modern” TB drugs — rifampicin, isoniazid, pyrazinamide, and ethambutol — had all been developed. These drugs are the same ones being used for TB treatment today, known as the RIPE regimen, usually undertaken for courses between 6 and 9 months.

While tuberculosis is still a highly prevalent illness in today’s world and is considered the top infectious killer in the world, the WHO estimates that between 2000 and 2016, around 53 million TB-related deaths have been prevented due to advances in TB vaccination, treatment, and detection. 

Early roots of modern medicine

During the 18th century and until the Industrial Revolution, medical practice was relatively primitive in its accuracy and quality.

While numerous medical texts were developed in the preceding decades, many of these were still of some use, but they were also outdated. Additionally, the technology available at the time further limited the potential for discovery, and despite this, much of today’s medical practice had its foundations set during this century. 

In the late 1800s, Louis Pasteur developed his groundbreaking “germ theory,” which for the first time examined the link between microbes, infections, and diseases.

This subsequently led to the invention of “pasteurization,” the process by which food, mainly milk and dairy products, is made safe for human consumption by being treated to remove disease-causing organisms. Pasteur is also credited with developing early versions of vaccines for diseases such as rabies and anthrax, and as a result, his contributions have revolutionized clinical medicine. 

Some years later, Joseph Lister built upon these discoveries along with his own observations and applied them to surgical settings. As a result of his experiments, he developed the first antiseptic protocols for performing surgery on soldiers returning from battle. 

These procedures represent the cornerstones of modern surgical antiseptic care.

The age of diagnostics and disease management

The Industrial Revolution was the progenitor of the discovery and invention of various medical advancements; however, some of the most notable discoveries came around the turn of the century. These were central to extending human life expectancy because they transformed how illnesses are detected, treated, and prevented.

Below are some of the key medical inventions that helped people better recognize and manage a wide range of diseases.

Innovations in medical imaging and early detection

One striking example is the advent of radiology, developed in 1895 by Professor Conrad Wilhelm Roentgen. Within a year of its discovery, more than a thousand papers were published on its use in clinical imaging. 

For the first time, this breakthrough granted doctors the ability to examine disease processes inside the body, without resorting to dissection and autopsy. This laid the foundation for later developments, such as breast mammography and, eventually, CT scanners and MRIs in the 1970s, which are now indispensable for modern screening, diagnosis, and prevention.

In addition to medical imaging, discoveries were also being made in the fields of diagnostics and laboratory testing.

The centrifuge, originally used in dairy processes to separate milk from cream, was first developed in a lab setting in 1869 to separate nucleic acids from white blood cells and remains instrumental in current-day diagnostics.

Such advances in lab medicine have been pivotal in the detection of and understanding of both infectious and non-communicable diseases.

Chronic disease management and treatments

Non-communicable diseases such as heart disease, strokes, high blood pressure, cancer, and diabetes were, and still are, major sources of illness and disability.

You often hear stories about people who seemed healthy suddenly dropping dead due to a heart attack or stroke, even professional athletes. However, the management and treatments for these diseases have advanced further, particularly for diabetes and high blood pressure.

Diabetes

One striking example of the progress made in this field is in diabetes treatment. Diabetes has long been elucidated as a disease of “sugar loss” from the body, and was often treated ineffectively with extreme carbohydrate-restricted diets, with very grim outcomes. 

The discovery of insulin in 1921 marked a breakthrough in this field and enabled the effective reduction of blood glucose levels for the first time.

In the decades that followed, newer formulations of insulin were developed, as well as oral antidiabetic agents, which provided patients with even better, more personalized control of their condition. These developments have led to significant progress in reducing diabetes-related complications and mortality.

Hypertension

Similar strides have also been made in treating hypertension, AKA high blood pressure, which was considered an untreatable illness up until the 1950s.

During this time, the first antihypertensive drug trials were being conducted and validated to lower blood pressure, as well as to reduce the incidence of stroke and heart failure. Multitudes of studies were conducted in the years after, seeking to establish guidelines for target blood pressures and decrease mortality rates due to complications, such as stroke, with great success. 

Nowadays, physicians can perform risk assessments for patients by calculating scores based on laboratory investigations and history, with astounding accuracy, even just on their phones. 

For conditions that require consistent monitoring, such as diabetes, patients no longer have to rely on frequent skin pricks or blood tests. Now, there are continuous glucose monitors and even insulin pumps that are inserted under the skin and deliver insulin when needed.

As these two conditions are closely interrelated and often comorbid, the strides made in their management over the past hundred years have been nothing short of remarkable and essential to increasing people’s longevity.

Breakthroughs in organ replacement and transplant

Around the same time, researchers were experimenting with possible therapies for patients with advanced kidney disease. Between the 1910s and the early 1950s, the concept of hemodialysis evolved from a niche idea to a widely accepted phenomenon. 

What used to be a morbid condition that meant almost certain death only a few decades prior had become a manageable ailment, adding significant years of life to those who might have had only months or even weeks to live without it.

Adjacently, leaps and bounds were being made in the fields of organ donation and transplant medicine. While stories of skin grafting date back to the Ebers Papyrus (1550 B.C.), the first verifiable skin transplant occurred in 1869. It was primarily used as a treatment for severe burns during World War I and World War II. 

It wasn’t until 1959, when the first successful human kidney transplant was done between two fraternal brothers, that things truly kicked off for this fledgling field. Within a decade, Dr. Christiaan Barnard had successfully performed the first human heart transplant in Cape Town, South Africa.

The development of such inventions revolutionized modern diagnostics and enabled the creation of more comprehensive guidelines for screening and early detection techniques.

Within a century, medicine had evolved to perform what had seemed, only a short while earlier, pure science fiction.

Read more: A Science-Based Guide on How to Prevent Cervical Cancer

Longevity in the 21st century: Tech, data, and biohacking

With the turn of the millennium and the advent of the digital age, technological advancements have paved the way for numerous developments in the fields of personalized healthcare, laboratory testing, real-time health monitoring, and telemedicine. This has made healthcare more precise and accessible, enabling people to lead longer, healthier lives. 

Take a look at some of these breakthroughs that mark remarkable progress in the human longevity journey. 

Advances in lab medicine

Over the past few decades, the quest for longevity has reached new heights.

Advancements in tissue engineering have enabled researchers to develop “lab-grown” organoids and tissue cultures that mimic real organs and facilitate the safe testing of new pharmaceuticals and drug-delivery systems, with uncanny accuracy. 

This has also opened the door to entirely lab-grown organs for transplant and regenerative purposes, replacing diseased ones. These approaches could eventually eliminate the need for live subjects, such as lab mice and rats — whose use has long raised ethical concerns — within a generation.

Personalized healthcare 

Another point of distinction is the level of personalization and customization available.

Nowadays, people have numerous ways to track their health and wellness markers. This has been facilitated by products such as wearable devices that track steps, heart rate, and sleep time, which are imperative for healthy aging.

Read more:  The Impact of Stress and Lack of Sleep on Skin Aging

Beyond tracking, these technologies are paving the way for truly personalized healthcare. The data they collect allows doctors to tailor treatments and lifestyle plans to each individual’s needs. For instance, diabetes care is no longer one-size-fits-all; practitioners can now leverage continuous data from glucose monitors, diet logs, and genetic testing to recommend adjustments tailored to each patient.

Some apps also connect people with healthcare professionals, such as telemedicine and online therapy applications, further streamlining the consultation and follow-up process for patients.

The medical tourism boom was also remarkable. This is when people travel all over the globe for various medical treatments, which, in recent years, has been advantageous in helping individuals find the specific care they desire.

This phenomenon has led to the development of health spas and wellness clinics that offer personalized care tailored to people’s needs — or even whims.

Unlike hospitals, these resorts aim to provide luxurious services, such as IV rejuvenation drips, full-body scans, plasma transfusions, cold plunge baths, and more, for their guests. These guests often invest large amounts of money in these services for their personal longevity, at premium prices — and with unclear results.

Buyer beware

In a similar vein, many have attempted to capitalize on such advancements in an effort to achieve immortality themselves. One striking example is Bryan Johnson, a 47-year-old entrepreneur who has dedicated his life and wealth to maximizing his lifespan. 

While Johnson claims to be “the healthiest person alive,” many of the therapies he tests have weak evidence and are not readily accessible to the general public. While he has received plenty of criticism for his experiments on himself and his son, Johnson seems to be steadfast in his belief that humans can “conquer death.”

This reflects a broader problem in the longevity market. Some emerging technologies and biomedical treatments are promoted as revolutionary despite limited or inconclusive proof of their effectiveness. From high-end biohacking regimens to so-called “anti-aging” products, the promise of extended youth often outpaces the science.

To this day, many fraudsters peddle products they claim will “enhance vigor” or “reverse aging.” These products are marketed in a way that capitalizes on people’s fear of aging and death, and often contain harmful substances and chemicals for the sake of making a quick buck.

These examples underscore the need for caution and critical thinking when approaching medical technologies or longevity products that lack solid scientific backing.

Societal implications of longevity

As people live longer, the knock-on effects of these aging populations will become a problem. 

Longer lifespans will necessitate the adaptation of entire societies to an increasingly aging population, with significant implications for healthcare systems, economic structures, government policies, and personal relationships.   

Discover how this effect is already evident in countries with the most pronounced longevity.

Aging populations and global health

While it has long been sought after, longevity once achieved is not all it’s cut out to be, especially when large portions of a population have achieved it.

Two clear examples of which are Japan and South Korea. Japan and South Korea consistently rank among the world’s highest life expectancies, with Japan home to one of the legendary “Blue Zones” in Okinawa. These regions specifically offer a unique perspective into what it means to have “achieved” longevity in a large slice of the population. 

Despite the perceived individual benefits of living longer, this longevity has reverberating effects through society, especially as more and more people enter their retirement years.

The burden of aging

Almost a third of Japan’s population is elderly (65 and older), whereas Korea has around 15% in that age group, with more than a twofold increase projected over the next three decades.

These demographics place a significant burden on the remainder of the population. As more people enter their retirement years, the more strain is shouldered on the working class to make up that difference. 

These shifts have detrimental effects on the economy, including higher labor costs, decreased productivity, and a blunted business expansion, which can prove disastrous in the long run. 

This is further compounded by the gap between the working class and the pensioners, wherein the working class’s efforts are shifted from generating business profits to bolstering the pensions of the elderly, who cannot work anymore.

An increase in aging populations also has further ripple effects on communities and, in particular, healthcare systems.

Elderly people often suffer from multiple comorbid chronic health issues, such as diabetes, heart disease, and neurological decline. This places significant pressure on the healthcare systems and the caregivers to continue taking care of the elderly while also managing their own jobs and lives. 

In South Korea, the situation is even more dire. The steady rate of decreasing fertility rates since the 1980s has been attributed to high living costs, insufficient childcare support for parental leave, and unfair hiring and workplace practices towards women. These factors have led to a general shift in perspective among the younger population away from having children and even getting married.

Quality vs quantity

The examples set by these countries can serve as cautionary tales about what happens when too many people live as long as they do, without the proper societal guardrails for it.

As more young people decide to have fewer children, it is only a matter of time before the parents of these kids are left to fend for themselves, with no one to take care of them, in both direct and indirect ways.

In fact, studies have shown that these two entities — quality and quantity of life — are not separate, but rather complementary. Nurturing strong interpersonal relationships and prioritizing one’s physical and mental health are associated with lower mortality rates and higher quality of life indices.

It is therefore imperative that people shift their focus from just living longer to living better, fuller lives.

In conclusion

The human pursuit of longevity is by no means a new phenomenon. Instead, it is as old as history itself. The tools and the terminologies have been updated, but the spirit is still the same.

In many ways, humans as a species have already achieved a certain level of longevity. Humans now live for longer than they ever have, and while life expectancies have plateaued recently, the fact of the matter is that most people will live much longer than most of their ancestors did. 

History shows you which paths to longevity have endured and are supported by the most substantial evidence. With these technological advancements and medical miracles being performed today, the sky truly is the limit for what humanity can achieve in the field of longevity.

Once again, this article reminds you that longevity isn’t just about adding years to life — it’s about adding life to those years. Beyond simply living longer, it’s equally important to live healthier and more fulfilling lives, nurturing not only physical well-being but also mental, spiritual, and social wellness.

If you want to see more resources on the history of longevity, check out the Longevity Science Labs. The lab uses the research of the Institute for Life Management Science to produce courses, certifications, podcasts, videos, and other tools. Visit the Longevity Science Labs today.

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Hidden deep within your bones is a factory that works tirelessly at all hours of the day to manufacture all the cells that make up your immune system; this is the bone marrow. 

However, just like any factory, your bone marrow needs maintenance to keep your body running as well as possible. This article will explore the functions of the bone marrow in relation to the immune system and analyze the best ways to keep it healthy.

Read on to learn all about the defense factory that keeps you healthy and how to boost its health! 

Bone marrow: The unsung hero

Bone marrow is the soft, spongy tissue inside your arm and leg bones. It works behind the scenes to manufacture all the cells that make up your blood, called “hematopoiesis,” or the process by which blood cells are formed. This starts as early as the 7th day of embryonic life! 

The simplest way to classify the products of this process is as red blood cells, platelets, and white blood cells, which are the main players in your immune system.

While bone marrow is not considered a classically vital organ like the heart or the brain, it’s just as essential to overall health. Imagine: the heart pumps blood to deliver nutrients and oxygen throughout the body, but without bone marrow, there would be no blood cells for the heart to pump!

However, most people are unaware of this critical role. It’s not emphasized at school, and when has it ever been “sexy” to discuss bone marrow health compared to other health fads like gigantic muscles? Because of this, you may be ignoring a crucial aspect of your immunity. 

That’s why, in the next few sections, you will get a further glimpse of how important your bone marrow is and what you can do to improve its health.

Bone marrow and the immune response

Every day, your body is exposed to countless pathogens with the potential to make you sick. These include viruses, bacteria, fungi, and parasites, just to name a few. To counter this, your bone marrow produces the cells that keep you safe from these pathogens and fight them when they enter your body. This is the function of the immune system.

Your immune system can defend itself against all types of microorganisms anywhere in your body. It does so through innate and adaptive immunity.

Innate immunity

You can think of innate immunity as the “general” immune system.

The innate immune system is mainly in the skin and mucous membranes, governed by cells known as neutrophils and macrophages. These are your body’s first line of defense against any invading microorganism.

However, they cannot “remember” familiar pathogens. Thus, they attack all pathogens indiscriminately, regardless of their origin. They also mediate inflammation when pathogens enter the body. 

For example, say you have a splinter in your finger. The skin acts as the first line of defense, a physical barrier to prevent the entry of bacteria. However, if the skin is broken, your body mobilizes neutrophils and macrophages to the injury. These cells engulf all invading bacteria before they can spread and cause infection.

Adaptive immunity

On the other hand, adaptive immunity is more “specialized” or “sophisticated.” It relies on lymphocytes, such as T and B cells, to generate a lifelong “immunological memory” for encountered pathogens. Although this process takes time, it results in a more accurate response.

The adaptive immune system usually takes over once the innate response fails to neutralize the infection.

To do so, the system must first recognize the type of germ causing the trouble; once it does, it mobilizes special T lymphocytes to attack the microorganism. In conjunction, the B cells work on producing antibodies that help stimulate more T cells and form the “immunological memory” against the pathogen.

To visualize this, remember the last time you got chicken pox. At the time, your innate immunity fought against the infection, so you probably spiked a fever — a non-specific protective mechanism. However, this tricky infection requires a more targeted approach: the adaptive immune system. 

A cascade of B cells spreads all across the body, producing antibodies against the virus-infected cells and marking them for destruction by the T cells.

After the infection is cleared, your body will remember the offending microorganism and can easily recognize and terminate it much quicker if you get exposed again. That’s why you’ve never had chickenpox again! This is the exact mechanism by which vaccines work and why people who get measles once or get vaccinated are immune for life afterward.

Bone marrow and disease resistance

You can’t underestimate the importance of your immune system. Thus, diseases affecting the bone marrow will harm you.

One of these diseases is leukemia.

Leukemias are a group of blood malignancies that affect the bone marrow. In 2020, they accounted for 2.5% of new cancer incidences and 3.1% of deaths. They are classified based on how quickly the cancer cells multiply and the type of cell line affected. 

One example is Acute Myeloid Leukemia (AML). As the name suggests, AML affects the myeloid progenitor line of cells.

Thus, the cells most affected are macrophages, neutrophils (also known as the innate immune system), red blood cells, and platelets. The condition is called “acute” because it rapidly produces and grows diseased cells that cannot perform their functions as well as their healthy counterparts.

Other conditions, such as certain anemias, environmental exposures, or infections, can suppress the bone marrow and compromise the immune system.

While these conditions are considered rare, their incidence can lead to severe effects. Thus, it’s essential to learn how to best care for your bone marrow and keep it healthy.

How to maintain bone marrow health

Although the bone marrow is autonomous in its ability to self-regulate and maintain itself, some practices protect it and ensure its long-term health.

Adopt a bone marrow-supporting diet

Your diet plays a much bigger role in regulating your immune system than you might think.

Certain vitamins and minerals, such as vitamin A and Zinc, have been found vital for cellular proliferation and proper function. A deficiency in either of those micronutrients has been linked to a marked reduction in immune function. 

Other micronutrients essential for proper immune functioning include vitamins C, D, E, and K and minerals such as iron and selenium. 

Vitamins A, D, E, and K are all fat-soluble vitamins. Pairing them with healthy fats, such as extra-virgin olive oil and a squirt of lime, over a salad is a simple way to ensure their absorption and increase your intake of healthy nutrients to support your immune health. 

Also, drink a lot of water. Staying hydrated allows all the aforementioned vitamins and minerals to reach where they’re most needed. It also helps keep cells well-oxygenated, further protecting against infection.

Read more: The Perks of Having a Balanced Diet

Consider bone marrow supplements

If you follow a particular diet (e.g., vegans, vegetarians, etc.) where it’s harder to get all the nutrients you need from food alone, consider some nutritional supplements. 

Your best bet would be a supplement combining the nutrients you need most. These nutrients are abundant in animal proteins, including vitamins B9 (folic acid), B12, and D. Vitamins B9 and B12 play a vital role in facilitating immune cell synthesis and proliferation, while a deficiency in vitamin D has been found to increase susceptibility to infections.

Before you start taking any nutritional supplements, though, make sure to consult with your doctor. You might find out that you have no real need to start one and potentially find a deficiency in one you didn’t expect.

Engage in regular exercise

Physical activity has also been positively linked to improved immune function and, by extension, bone marrow health. 

Studies have shown that regular, moderate physical activity promotes improved immunosurveillance, the process by which the immune system finds threats and neutralizes them. This effect is most prominent after short exercise sessions, and it compounds in the long run with more frequent sessions.

Moderate exercise has also been shown to exert anti-inflammatory effects, improving glucose and fat metabolism over time.

A systematic review published in 2021 found that regular moderate to vigorous exercise reduces the risk of acquiring infectious diseases and dying from them. Additionally, some of the evidence suggests that regular exercise enhances vaccine potency.

To maximize these effects, you should plan regular exercise sessions that last an average of 30 minutes, 3-5 times a week. Try to include both aerobic exercises, such as brisk walking, cycling, or swimming, and resistance exercises of variable intensities. 

Read more: How to Create Optimized Workout Routines to Maximize Productivity

Avoid bone marrow-damaging habits

Just like there are practices that boost your bone marrow health, there are habits you should avoid, as they can damage it and compromise immune functions. 

It is no surprise that smoking is at the top of that list. Avoiding smoking will protect your health in general, but specifically your bone marrow as well. This is because smoking has harmful effects on both innate and adaptive immunity and has been linked to causing a wide variety of cancers.

Another habit you must avoid is not sleeping enough. Sleep is when your body performs all of its restorative functions, and sleeping for fewer hours than you should or having low-quality sleep has been linked to acute and chronic inflammation, higher infectious disease susceptibility, heart disease, and cancer.

Lastly, avoid eating too many high-fat and processed foods. Reliance on overly processed meats seems to cause low-grade inflammation throughout the body’s tissues. This inflammation adversely affects bone marrow cell function and differentiation, impairing immune functionality and disease resistance.

In conclusion

Healthy bone marrow is a cornerstone of a healthy and well-maintained body. As the chief producer of all the components making up your immune system, its maintenance and care are of utmost importance to anyone. 

Now that you understand how important the bone marrow is in keeping your body safe from outside invaders, remember to implement the practices above. Not only will they improve bone marrow health, but they’re also great for your overall well-being. After all, the human body is intricately connected, so what’s good for your bones is also suitable for everything else.

So, eat a balanced diet, exercise regularly, avoid bad habits, and take supplements when needed! These will positively impact all your organ systems, including bone marrow and the immune system!

If you would like to see more resources on bone marrow, check out the Longevity Science Labs. The lab uses the research of the Institute for Life Management Science to produce courses, certifications, podcasts, videos, and other tools. Visit the Longevity Science Labs today.

Photo by Freepik

The post Bone Marrow: The Hidden Hero of Your Body’s Defense System appeared first on Insights.

While summer means fun in the sun and long beach days, it also means saltwater, heat, humidity, and chlorine, all of which can cause irreparable damage to your locks — leaving them dry, discolored, and damaged.

But fear not; this article will provide all the practical advice to summer-proof your hair all season long!

Understanding the effects of summer on hair

Hair, skin, and nails are all made of roughly the same material: keratin. Keratin is a protein, and like all proteins, there are optimal and suboptimal conditions for it to perform its functions properly. 

Unfortunately, summertime combines many elements that negatively affect keratin and its structure. This mix often leads to hair that is dull, dry, and prone to breaking and losing color easily.

This section will specifically detail the effects of the summer elements on your hair, giving you a clue about what you’re up against.

Damage from the sun

The sun is arguably the number one reason people go out (or stay in) during the summer.

That being said, it is also the biggest culprit in causing the most damage to hair during those months. Excessive exposure to the sun’s harmful ultraviolet (UV) rays and high temperatures can wreak havoc on your hair. The sun emits UV rays, which leads to hair protein loss and even color changes. 

Additionally, the heat can strip your hair of its natural moisture, leaving it dry, brittle, and prone to breakage.

This dryness causes split ends, frizz, and unhealthy, unmanageable hair. In fact, these UV rays are also responsible for all the tans and sunburns you get in the summer, which is to say that you should also be taking measures to protect your skin from the sun.

Read more: How to Protect Your Skin From the Sun: The Ultimate Guide

Impact of humidity and saltwater

Humidity can be your hair’s worst enemy. The moisture in the air can cause your hair’s outermost layer to swell, leading to frizz and loss of shape.

Salt water, on the other hand, can strip your hair of its natural oils, leaving it dry, brittle, and prone to breakage. This is especially true if you spend a lot of time swimming in the ocean or pool. 

The result of all this is dull hair, split ends, and ultimately, lots of frustration when dealing with it!

Tips for summer-proofing your hair

By understanding all the previously mentioned causes of summer hair damage, you can take proactive steps to address these issues and maintain healthy, vibrant hair throughout the season.

This next section will highlight some tips to prevent hair damage and even enhance its natural beauty and luster!

Use protective hair products

The sun is one of the most potent sources of damage to your hair and scalp in the summer.

Thus, scalp sunburns are a real threat, especially if you are continuously exposed. This is why sunscreens should be one of the mainstay tools in your arsenal to keep yourself protected.

That being said, did you know that just like sunscreens for your skin, there are similar products for your hair? 

Although human hair already acts as natural sun protection, you should still take measures to ensure its continued health and longevity. Hair sunscreens typically come in the form of sprays or leave-in conditioners. These work by forming a protective barrier on your hair, shielding it from the sun’s damaging UV rays.

When choosing a hair sunscreen, look for products that suit your hair type, are specifically designed for hair protection, and contain UV filters. These products can help prevent dryness, breakage, and color fading caused by sun exposure.

Rinse and cleanse regularly

Summertime means swimming! Whether splashing around in a pool or catching waves at the beach, it’s important to remember that swimming can take a toll on your hair. 

Swimming pools are often kept clean by a cocktail of noxious chemicals, such as chlorine. In fact, chlorine has been found to be damaging to the hair proteins and even causes hair bleaching when combined with the sun’s UV rays. 

That is why you must rinse your hair thoroughly with fresh water after a long day’s swim in the sea or the pool. Also, use a gentle shampoo to clear out any saltwater, sand, or chlorine that might have come in contact with it. 

Hydrate and moisturize

To combat the myriad effects of sun exposure, humidity, saltwater, and dryness, keep your hair well-hydrated. Do deep cleanings with shampoos and conditioners after prolonged exposure to saltwater to revive your hair. This also prevents any breaks in your hair.  

Unfortunately, most name-brand shampoos and conditioners contain tons of ingredients that ruin your hair in the long run. 

Some of the ingredients that have been studied and found to be most harmful include:

• Sulfates. One of the most common shampoo ingredients, which often strips your hair of natural oils and causes dryness and irritation.
• Parabens. A preservative linked to hormonal disruption.
• Formaldehyde. A known allergen and carcinogen, often found in keratin treatments.
• Dimethicone. Prevents hair from getting moisturized and clogs your pores.
• Triclosan. Which was recently banned in the USA from being used in antimicrobial soaps.

Additionally, limit using heat-styling tools such as dryers and straightening irons. These tools often run hotter than 200℃, which causes extreme heat stress on your hair and leads to significant damage to your curls. 

Wear protective hairstyles

Wearing your hair in certain styles could be preferable to ensure maximum protection from the sun. Some of the best and most shielding styles include:

• Top knot
• High ponytail
• Headscarf or bandana

Sometimes, the best hairstyle is no hairstyle at all; wear a hat! By wearing a wide-brimmed hat, you can protect your hair, face, and even your neck from the sun’s UV rays, all while looking stylish. It’s a win-win!

Trim regularly to prevent split ends

Regular trims are crucial for maintaining healthy hair, especially in summer.

Trimming away split ends prevents them from traveling further up the hair shaft, causing more damage. This keeps your hair looking fresh and vibrant and even promotes healthy growth.

By scheduling regular trims, you can ensure that your hair stays strong, resilient, and split end-free throughout the summer season.

It’s recommended to get a trim every 6-8 weeks during the summer to keep your hair in optimal condition.

In conclusion 

Summer is either one of your most or least favorite seasons. But regardless of your inclination, there is no argument that summer conditions are some of the most stressful for keeping your mane healthy and lush. 

By understanding how summer can negatively affect your hair and implementing the practices outlined in this article, you should now be more than capable of summer-proofing your hair, and staying stress-free in those months!

Take these proactive steps to enjoy the summer without sacrificing the beauty and health of your hair.

If you would like to see more resources on hair, check out the Longevity Science Labs. The lab uses the research of the Institute for Life Management Science to produce courses, certifications, podcasts, videos, and other tools. Visit the Longevity Science Labs today.

Photo by Freepik

The post How to Summer-Proof Your Hair appeared first on Insights.

This article will serve as the ultimate guide on how best to protect your skin from the sun and will outline the various techniques you can use to achieve that. So grab your shades and your sunscreen and read on!

Understanding sun damage

The sun plays a pivotal role in sustaining all life on Earth. It’s a key factor in the creation and utilization of vitamin D, which is one of the essential micronutrients that humans need for proper body functioning.

The sun does this by emitting ultraviolet (UV) rays, which enter the cells and effectively “turn on” the precursors to vitamin D synthesis, making it available for the body to use properly. However, humans only need a small amount of sunlight for this process to occur.

Research has shown that spending between 5 to 30 minutes in the sun a day for most days of the week, with no sunscreen, is optimal for the body to absorb enough UV radiation to produce vitamin D. 

Beyond that time, it is recommended that you follow all the upcoming methods to properly protect yourself from sun overexposure, as those same UV rays are directly responsible for increasing your risk of skin cancer. 

Types of UV rays

The sun emits 3 types of UV radiation: UVC, which is completely absorbed by the atmosphere; UVB, which is almost completely absorbed; and UVA, which comprises 95-97% of UV radiation that reaches the earth’s surface.

Although all UV radiation has potent health effects, UVA especially is linked to premature aging in the skin, wrinkling, and pigmentation (AKA tanning). UVB causes sunburns and leads to direct damage to skin cells’ DNA, thus predisposing it directly to certain types of cancers. 

In fact, UV radiation is classified as the most important “modifiable risk factor,” i.e., something you can directly influence or reduce exposure to, for the 3 most common types of skin cancer.

That is why it is critical to be well informed on the risks of sun overexposure and how best to protect yourself.

Risks of sun exposure

Sun overexposure has been linked to a variety of both short-term and long-term health conditions.

For example, the sun can have a profound effect on your bodily functions. Human bodies, on average, cannot withstand direct heat for long periods of time without rest. Overexposure can lead to systemic conditions, such as:

• Heat stroke. A medical emergency as categorized by confusion, seizures, and loss of consciousness, which can be fatal if left untreated.
• Heat exhaustion. A milder form of heat stroke with symptoms like fatigue, dizziness, and profuse sweating. It’s usually managed by resting in the shade, drinking water, and cooling down.

Aside from body-wide problems, it can also lead to more specific malfunctions, such as skin conditions:

• Premature wrinkling
• Sunburns
• Malignant melanoma, the most aggressive form of skin cancer
• Basal cell carcinoma, the most common type of skin cancer

Besides your skin, your eyes are exceptionally sensitive to UV damage. Thus, failing to protect them can lead to:

• Cataracts
• Retinal damage

The human body is extremely great at keeping a steady balance when the weather changes. This is done through a process called thermoregulation, which is the main function of the sweat glands.

However, sweating alone is not enough to protect against sun overexposure. Therefore, it’s essential for you to learn the best approaches for protecting your skin from the sun.

Read more: The Powerful Role of Hydration in Sweat Gland Health

Best techniques to protect your skin from the sun

Now that you understand how unchecked exposure can lead to health problems, you can understand why it is so important to keep yourself protected. This section will detail the best scientific techniques to stay safe in the sun.

Choosing the right sunscreen

It might be cliche, but the importance of using sunscreen cannot be overstated. Especially if you live in a city with higher sun exposure, work outdoors, or are consistently exposed to the sun for long periods of time.

But before you go out shopping for sunscreen, it’s important that you keep your preferences and needs in mind before making a purchase. It can be difficult, given all the choices out there. That’s why this next section will have everything you need to make the best choice.

Mineral vs. chemical sunscreen

Sunscreens are broadly divided into two categories: mineral and chemical sunscreens. 

Mineral sunscreens, also known as organic or physical sunscreens, usually contain zinc or titanium, which work by reflecting UV rays off your skin. Active once applied, they are often a better choice for those with oily or acne-prone skin since they are not absorbed.

Inversely, chemical sunscreens contain ingredients such as avobenzone and oxybenzone, which provide sun protection by actually absorbing UV rays and dispersing them as heat. These are usually easier to apply.

However, it takes around 20 minutes to become effective since it needs to be absorbed into the skin.

That being said, there are a few ethical and health concerns regarding the safety of some chemical sunscreen ingredients, which aren’t yet proven in long-term studies. For example, oxybenzone and octinoxate, two common sunscreen ingredients, were banned in Key West and Hawaii after being found to have toxic effects on marine life.

Also, some studies have reported concerns about those same ingredients, noting that high rates of absorption could potentially lead to adverse effects on both male and female fertility.

Other research has pointed towards an association between oxybenzone and thyroid and kidney function. However, there has been no definitive data to support either of these claims yet.

Understanding SPF

Another crucial element to note when buying sunscreen is the sun protection factor, commonly known as SPF.

SPF is a measure of how well your sunscreen protects you from the sun and not how long it protects you. As SPF increases, sunburn protection increases. It is also highly recommended that you search for a sunscreen that’s labeled as “broad spectrum,” as this will provide shielding against both UVA and UVB rays.

Wearing sunscreen with a higher SPF will be more effective for protecting your skin in general. However, you should also consider other personal factors that influence your own sun exposure. These include: 

• Skin type. If your skin is oily or acne-prone, then it would be best to look for products that are oil-free or non-comedogenic to avoid blocking your pores. If you have dry skin, then it’s best for you to find one that has a moisturizing ingredient, such as glycerin or hyaluronic acid.
• Time spent in the sun. If you spend a longer time in the sun, you will need to reapply more often, as it gets “used up.”
• Reapplication frequency. This depends on how heavy your usage is and whether or not you are swimming or sweating a lot.
• Type of clothing worn. What you wear will influence how much and what areas you will cover with sunscreen. Wearing protective clothing is always recommended.

If you’re consistently exposed to the sun for long periods, then you will most likely gravitate towards a product with higher SPF. This provides a minimum SPF of 15 and even up to SPF 100, as per the Food and Drug Administration’s recommendations.

Water-resistant sunscreens

If you’re going swimming or are planning to engage in watersports, it is best to use a chemical-based sunscreen with a high SPF (minimum of 15).

Those products actually absorb into the skin and are most often available in water-resistant formulations; they are also best suited if you tend to sweat a lot in the sun.

Amount and frequency of application

To get the most use of your sunscreen, it is recommended that you liberally apply one ounce (about enough to fill a shot glass) over all exposed areas.

This includes arms, legs, hands, feet, and face; don’t forget to cover those often-missed areas like the back of your legs, neck, and ears!

Regardless of which type you choose, no sunscreen will be able to completely block all UV rays. Also, the efficacy of your sunscreen will wear down over time as it gets washed away or “used up” the longer you spend in the sun.

It is, therefore, important that you consistently reapply it. Ideally, every two hours when swimming, more depending on how intense your usage is and what kind of activities you’re performing while wearing it.

Wearing protective clothing

While sunscreen is an indispensable asset for facing the sun, it is not enough alone. To adequately protect yourself, you need to combine multiple approaches.

In addition to sunscreen, consider wearing protective clothing.

A wide-brimmed hat will shade your face, neck, and ears. Sunglasses with UV protection guard your eyes and the surrounding skin. Opt for long-sleeved shirts made of UV-blocking fabric to minimize sun exposure on your arms.

These simple steps can significantly reduce your risk of sunburn and long-term skin damage. 

Staying in the shade

Minimize your exposure to harmful UV rays by avoiding extended time outdoors during peak sun hours, typically between 10 am and 2 pm. Seek the shade of trees, umbrellas, or buildings whenever possible. By staying in the shade, you can significantly reduce your risk of sunburn and long-term skin damage.

Staying hydrated

To maintain your body’s health and prevent dehydration, it’s crucial to stay hydrated throughout the day.

Drink plenty of water, even if you don’t feel thirsty. Dehydration can increase your risk of heat exhaustion and other health issues. By staying hydrated, you’ll support your body’s ability to regulate temperature and function optimally in hot weather.

In conclusion

Sun protection is an essential but often overlooked part of any skincare routine. By understanding the types of sunscreen, SPF, and application guidelines, you can now effectively protect your skin from the sun’s harmful rays.

Remember that combining consistent sunscreen use in addition to other techniques is essential for maintaining healthy skin and preventing sun-related damage. Your skin will thank you for it!

If you would like to see more resources on the skin, check out the Longevity Science Labs. The lab uses the research of the Institute for Life Management Science to produce courses, certifications, podcasts, videos, and other tools. Visit the Longevity Science Labs today.

Photo by rawpixel.com on Freepik

The post How to Protect Your Skin From the Sun: The Ultimate Guide appeared first on Insights.