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  1. The Diary Of A CEO with Steven Bartlett
  2. Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!
Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett · Jul 27, 2026

Neurologist Dr. Stacia Gomanak reveals sleep disorders are often caused by Vitamin D & B deficiencies from indoor life, not just bad habits.

Vitamin D Is a Misclassified Hormone, Not a Vitamin

Vitamin D functions like a hormone by entering a cell's nucleus to trigger DNA expression. This misclassification has led to misunderstandings about its importance and proper management, which should be based on blood levels like other hormones, not fixed doses.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Your Gut Microbiome, Not Food, Is Your Primary B Vitamin Factory

Many B vitamins are produced by bacteria in the gut. A healthy microbiome, which requires adequate Vitamin D to flourish, is essential for this production. This suggests that gut health is the root determinant of B vitamin levels, more so than diet alone.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

A 3-Month B-Vitamin 'Jump-Start' Can Reboot a Deficient Gut Microbiome

Restoring a damaged gut microbiome isn't just about probiotics; it requires providing its necessary growth factors. A short, three-month course of B-complex vitamins can "jump-start" the right bacteria. After this, supplementation should cease, allowing the now-healthy microbiome to take over B-vitamin production.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Neurological Diseases Are Often Symptoms of a Failing Sleep-Repair System

Many neurological illnesses are the downstream consequence of a broken nightly repair system. When restorative sleep phases (like deep and REM sleep) are consistently absent, the body and brain cannot perform essential maintenance, leading to the development of what we diagnose as distinct neurological diseases.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Vitamins Can Be as Dangerous as Prescription Drugs Without Proper Knowledge

Contrary to popular belief, vitamins are not harmless. They are a form of biohacking that can cause significant harm and chemical imbalances if taken improperly. The side effects of incorrect vitamin use can ironically mimic the very symptoms you're trying to treat.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

The 1980s Indoor Lifestyle Shift Sparked Modern Disease Epidemics

The rise of diseases like ADHD, fatty liver, and depression since the 1980s is not just due to toxins but coincides with a major lifestyle shift indoors, driven by computers, air conditioning, and sunscreen. This deprived humans of essential biological inputs from the sun, leading to systemic health issues.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Flawed Vitamin D Studies Use Fixed Doses Instead of Personalized Blood Levels

Most Vitamin D research fails because it treats it like a drug, giving everyone a fixed dose. As a hormone, Vitamin D requires personalized dosing to achieve a specific blood level, just like thyroid or testosterone. This methodological flaw explains the conflicting results in many studies.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Obesity is a Phenomenon of Indoor Animals, Including Humans

In the wild, animals are not obese. Obesity is almost exclusively found in humans and the domesticated pets that share their indoor lifestyles. This suggests that being indoors, and the resulting lack of natural environmental signals like sunlight, is a key driver of metabolic disease.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Vitamin D Pills Are a Poor Substitute for Natural Sun Exposure

Supplementing Vitamin D is not the same as being in the sun. Sunlight creates a sulfated form of Vitamin D on the skin and triggers the production of many other beneficial chemical compounds. A pill provides only one isolated component, missing the broader biological benefits of sun exposure.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Sleep Chronotypes ("Night Owls") Are Caused by Chemical Imbalance, Not Genetics

Being an "early bird" or "night owl" is often not a fixed genetic trait but a symptom of brain chemistry disruption. Correcting vitamin deficiencies can often reset individuals to a natural sleep cycle of roughly 10 PM to 6 AM, regardless of their previous chronotype.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Vitamin D Deficiency Impairs REM Sleep by Blocking Acetylcholine Production

Vitamin D triggers the production of an enzyme that creates acetylcholine, the key neurotransmitter for the parasympathetic nervous system and REM sleep. A deficiency in Vitamin D therefore leads to a deficiency in acetylcholine, disrupting mood, memory consolidation, and the ability to enter REM sleep.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Increasing Vitamin D Intake Can Trigger a B Vitamin Deficiency

Supplementing with Vitamin D can accelerate the body's repair systems. This increased metabolic activity consumes more B vitamins, potentially leading to a deficiency if not also addressed. This can cause new symptoms like joint pain or burning sensations.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago

Vitamin D Is the 'Hibernation Hormone' That Regulates Sleep Cycles

Vitamin D acts like a hibernation hormone, signaling seasonal adaptation. When levels are chronically low, as with modern indoor lifestyles, the brain loses its ability to regulate sleep cycles effectively, essentially 'forgetting' how to sleep. This is why low D levels are linked to profound sleep disruption.

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice! thumbnail

Vitamin D Expert: The Supplement World Is Giving The WRONG Advice!

The Diary Of A CEO with Steven Bartlett·3 months ago