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Welcome back to Chasing Eden, where we rediscover our bodies
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divine design. I'm your host, Carolyn Thompson. In today's modern world,
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many of us live in environments that look very different
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from the way human beings live for most of history.
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We wake up indoors, commute indoors, work indoors, and relax indoors.
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Artificial lighting replaces sunlight, screens replace open air, and convenience
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replaces the rhythms of nature. And yet our bodies were
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never redesigned for this modern lifestyle. They still operate according
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to the same biological principles that governed human health thousands
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of years ago. One of the most fascinating examples of
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this design is vitamin D. Unlike most nutrients we talk about,
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vitamin D isn't simply something we eat. It's something our
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bodies were designed to produce from sunlight. When ultraviolet b
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rays from the sun touched the skin, a complex biological
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process begins that ultimately produces a compound essential for bones, immunity, hormones, mood,
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and cellular health. But here's the surprising part. Despite living
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in a technologically advanced society, vitamin D deficiency is now
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extremely common Researchers estimate that over one billion people worldwide
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may have inside efficient vitamin D levels, and many don't
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even realize it. Low energy, weak immunity, mood changes, muscle aches,
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and chronic health problems are often traced back to something
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as simple and as profound as inadequate vitamin D. So
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today we're going to take a deep dive into this
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remarkable nutrient. We'll talk about what vitamin D actually is,
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why it functions more like a hormone than a vitamin,
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the signs and symptoms of deficiency, why modern life has
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made deficiency so common, the role of supplementation, and how
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vitamin D supports nearly every system in the body. We're
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also going to explore insights from respected voices in the
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health world, including doctor Eric Berg, doctor Barbara O'Neil, dave Asprey,
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human biologist Gary Breka, doctor Daniel Pampa, and doctor Andrew Huberman,
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who have all spoken about the importance of vitamin D
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and maintaining optimal health. Because when we talk about returning
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to eden, returning to the body's original design, we are
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often talking about restoring the simple things that modern life
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has disrupted, and sunlight is one of the most powerful
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of these simple things. One of the first things that
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surprises people about vitamin D is that it technically it
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isn't really a vitamin in the traditional sense. Most vitamins
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must be obtained through food. Vitamin C, for example, must
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come from fruits and vegetables because the body cannot produce it.
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Vitamin D is different. When sunlight hits the skin, cholesterol
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molecules are converted into vitamin D three. I'm going to
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repeat this. When sunlight hits the skin, cholesterol molecules are
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converted into vitamin D three. So that tells us that
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cholesterol is important and it has a role in one
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of the most important parts of our health and our
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well being, and that is to have the molecules be
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converted into vitamin D three. So you might want to
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go look up and investigate the role of cholesterol. It's
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been demonized throughout the decades, and a lot of doctors
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and homeopaths are now discussing how important the role of
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cholesterol actually is in our diet and it's not so
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bad after all. It's actually necessary for us. Lowering cholesterol,
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according to them, could actually be detrimental to your health.
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And one of those things that it might do is
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stop the body from making vitamin D three. So this
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vitamin D three wants the cholesterol, converts the molecules into it,
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then travels through the bloodstream to the liver and kidneys,
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where it is transformed into its active hormonal form called calcitriol.
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At that point, vitamin D begins interacting with vitamin D receptors,
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which exist throughout the body. In fact, scientists have discovered
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that vitamin D receptors are in almost every major tissue,
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including immune cells, brain tissue, muscles, bones, the cardiovascular system,
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and the endocrine system. This explains why vitamin D influences
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so many aspects of our health. Doctor Eric Burke frequently
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points out that vitamin D functions more like a master
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regulator hormone than a simple nutrient. He explains that vitamin
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D interacts with hundreds of genes in the body that
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control inflammation, immune signaling, and metabolic processes. When vitamin D
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levels are adequate, these systems tend to operate more smoothly.
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When levels drop, the body often begins to struggle. Vitamin
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D first became widely known in the early nineteen hundreds
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when researchers discovered its role in preventing rickets, a disease
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that caused severe bone deformities in children. Children living in
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industrial cities during the early twentieth century often developed rickets
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because pollution blocked sunlight and diets lacked sufficient nutrients. Once
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scientists realized sunlight exposure prevented the disease, vitamin D quickly
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became recognized as essential for bone health. But over the
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past several decades, researchers have discovered that vitamin d's role
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extends far byad beyond your bones. Today, it is understood
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to influence immune regulation, hormone production, brain health, cardiovascular function,
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muscle strength, and inflammation levels. In other words, vitamin D
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is not just a bone vitamin, It is a whole
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body nutrient. If vitamin D is so important, why are
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so many people deficient? The answer lies largely and how dramatically.
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Modern life has changed our relationship with sunlight. For most
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of human history, people lived and worked outdoors. Farmers, hunters,
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and laborers spend hours each day under natural light. Today,
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many people spend the majority of their time indoors. Consider
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a typical modern schedule. You wake up inside your home,
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you drive your car to go to work, you work
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in an office under artificial lighting. You return home in
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the evening. In many cases, the skin may receive very
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little direct sunlight throughout the day. Doctor Andrew Huberman has
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discussed this shift extensively. He explains that sunlight exposure plays
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a critical role not only in vitamin DE production, but
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also in regulating circadian rhythms and hormone balance. When sunlight
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exposure drops, several biological systems can begin to drift out
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of alignment. Several other factors also influence vitamin D production,
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like latitude. People living farther from the equator often receive
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less UVB exposure During winter months. In northern regions, the
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sun's angle becomes too low for significant vitamin D production.
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During parts of the year, skin pigmentation melanin acts as
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a natural sunscreen. Individuals with darker skin require longer sun
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exposure to produce the same amount of vitamin D. Aging
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As people age, the skin becomes less efficient at synthesizing
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vitamin D sunscreen. While sunscreen protects against excessive UV exposure,
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it also blocks much of the UVB radiation required for
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vitamin D production. And you may have seen on social
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media people claiming that things like olive oil work as
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a natural sunscreen, or things like eating certain things. I
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think another one is like coconut oil consumption. I've never
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tested this out. I don't know if it's true, but
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it's just a kind of an interesting thing to ponder. Now,
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another thing that affects your vitamin D production is something
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that really might it surprise you. And since we've had
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somewhat of an epidemic in our country of obesity, it's
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interesting to note that obesity also has an effect on
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the way that you absorb your vitamin D. Vitamin D
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is a fat soluble vitamin, meaning it can be stored
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in fat tissue rather than circulating in the bloodstream. Sometimes
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that lowers your measurable levels. All of these factors combine
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to make deficiency surprisingly common. The symptoms of vitamin D
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deficiency can be subtle. Many people live with low levels
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for years without recognizing the cause of their symptoms. Some
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of the most commonly reported signs include chronic fatigue, muscle weakness,
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bone pain, frequent illness, low mood, brain fog, and poor
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recovery after exercise. Doctor Berg frequently lists symptoms such as
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muscle aches, frequent infections and low energy as common indicators
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of vitamin D deficiency. Because vitamin D affects immune cells,
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deficiency may also increase susceptibility to respiratory infections and inflammatory conditions.
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We're going to pause here briefly. When we come back,
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we'll explore one of the most fascinating aspects of vitamin
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D its role in immune system regulation, brain health, and
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inflammation control, and why so many experts believe maintaining optimal
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vitamin D levels is one of the most important foundations
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for long term health. Stay with me, and we left off.
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We were talking about how incredibly common vitamin D deficiency
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has become in modern life and how subtle the symptoms
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can be. But the reason vitamin D deficiency matters so
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much is because of the enormous role this nutrient plays
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in regulating some of the body's most important systems. One
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of the biggest of those systems is the immune system.
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For many years, scientists believe vitamin d's primary role was
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related to calcium absorption and bone health, but over the
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last two decades, research has revealed something far more significant.
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Vitamin D acts as a key regulator of immune function.
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Immune cells, including T cells, and macrophages contain vitamin D receptors.
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When vitamin D binds to these receptors, it influences how
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immune cells communicate, respond to threats, and regulate inflammation. In
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simple terms, vitamin D helps the immune system know when
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to fight and when to calm down. This balancing effect
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is critical. A weak immune response can allow infections to spread,
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but an overactive immune system can lead to autoimmune disorders,
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chronic inflammation, and tissue damage. Vitamin D helps maintain the
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balance between those two extremes. Doctor Eric Berg often emphasizes
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that vitamin D is one of the most important nutrients
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for immune health. In his educational material, he notes vitamin
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D is essential for immune system regulation. It helps activate
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immune defenses while also preventing excessive inflammatory reactions. This dual action,
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supporting defense while preventing overreaction is what makes vitamin D
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so fascinating From a biological standpoint. Chronic inflammation has become
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one of the most widely discussed topics in modern health research.
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Many of the conditions affecting people today, from heart disease
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to autoimmune disorders to metabolic dysfunction, share one common underlying factor.
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Persistent low grade inflammation. Vitamin D appears to play a
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role in helping regulate that inflammatory response. When vitamin D
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levels are sufficient, immune cells tend to produce a more
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balanced inflammatory response. And in case you haven't noticed, we
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tend to have an epidemic of inflammatory problems at this
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point in our country. Seems like everybody has some type
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of condition related to inflammation. When vitamin D levels are low,
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inflammation signals can become disregulated. Doctor Daniel Pompa frequently speaks
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about inflammation as a central factor in chronic disease. In
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his discussions about metabolic and cellular health, he emphasizes that
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nutrients like vitamin D help regulate inflammatory signaling pathways that
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influence how the body heals and repairs itself. In other words,
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vitamin D does not simply, quote unquote boost immunity, It
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helps orchestrate it. Another area where vitamin D has received
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significant attention is respiratory health. Research has shown that individuals
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with adequate vitamin D levels tend to experience fewer respiratory
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infections compared with those who are deficient. This relationship has
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been studied in multiple populations, particularly in individuals who experience
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seasonal respiratory illnesses. Part of this protective effect may come
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from vitamin d's role in supporting antimicrobial peptides, molecules that
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help the immune system neutralize invading pathogens. Doctor Barbara O'Neil
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often emphasizes the importance of natural sunlight for immune resilience.
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In her lectures on natural health. She frequently encourages people
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to spend time outdoors, explaining that sunlight exposure plays a
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key role in helping the body maintain balanced immune function.
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She has remarked in several talks that the human body
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was designed to interact with sunlight. When we avoid it
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complet lely, we disrupt one of the most important biological
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processes that sustain health unquote. This perspective highlights something we
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often forget in modern health discussions. The human body was
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built for a natural environment, and sunlight is part of
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that environment. Beyond immunity, vitamin D also appears to play
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a significant role in brain function. Isn't that a surprise, right.
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Vitamin D receptors have been identified throughout the brain, particularly
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in areas involved in mood regulation and cognitive processing. Researchers
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have been studying vitamin d's relationship with mental health for
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many years, and while the science continues to evolve, several
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patterns have emerged. Low vitamin D levels have been associated
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with increased risk of depression, seasonal mood changes, and reduced
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cognitive performance in some populations. Doctor Andrew Huberman has discussed
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the relationship between sunlight exposure, circadian rhythms, and brain chemistry.
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While his research often focuses on light exposure and nervous
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system regulation, he frequently highlights how sunlight influences multiple biological
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pathways that affect both mental and physical health. In his
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neuroscience discussions, Doctor Huberman explains that morning sunlight exposure helps
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to regulate your circadian rhythms, which we've often heard on
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social media. If you follow anybody into health on social media,
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there's a lot of people showing videos of themselves out
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in the sun and relaxing and wearing a bikini and
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trying to expose as much of their body to the
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sun ladies they possibly can. Also, there's people that will
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say that waking up to the sun rise, that there's
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something about the redness in the sun upon rising that
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has something special in it that helps to regulate your
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circadian rhythms. As well as watching the sun set. And
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apparently there's a whole group of people insisting that that
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there's actually a science to this. Now I've never dug
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deep into this to see if it's true. So I'm
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not really waking up with the sun rise and running outside.
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But I actually have an alarm on my phone that
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tells me every day at eight am, go outside with
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a hot cup of tea or whatever, you know, just
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go outside at eight o'clock and at least I know
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by that time the sun's up and maybe it's not
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that cold out, so I'll put a coat on and
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grab my cup of tea and just to sit out
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there for a little bit, because I do know, I
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feel that it makes a difference when I sleep at night.
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I did it three days in a row. I managed
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to hit three days in a row, and each night
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I was going to bet. I was dreaming, dreaming every night,
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and I thought, okay, this is I think this might
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be working, you know, or unless it's some type of
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you know, what do they call it, that effect, you know,
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a mental thing, but it does seem to be working
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for me. So Hooberman who talks about the morning sunlight
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exposure helping to regulate the circadian rhythms. Also, he talks