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[The Hidden Connection Between Vitamin D, Your Microbiome, and Sleep Disorders]-[The Shocking Connection Between Vitamin D & Sleep - With Dr. Stasha Gominak]

The Model Health Show · B2 · 2026-03-02

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📋 Summary

The Biological Roots of the Global Sleep Epidemic

In this episode of The Model Health Show, host Shawn Stevenson sits down with neurologist Dr. Stasha Gomenak to explore a groundbreaking perspective on the global sleep crisis. Moving beyond conventional wisdom, Dr. Gomenak argues that sleep struggles are not merely a lifestyle issue but are deeply rooted in hormonal deficiencies—specifically involving vitamin D and the intestinal microbiome.

Vitamin D: More Than Just a "Bone Vitamin"

Dr. Gomenak challenges the common reductionist view of vitamin D as a simple vitamin. Instead, she defines it as a "psychosteroid"—a steroid hormone that influences behavior, fertility, and metabolism. According to her research, vitamin D acts as a master regulator of biological processes, including the expression of thousands of genes.

She explains that our modern struggle with sleep is evolutionary. Historically, vitamin D levels would rise and fall with the seasons, signaling the body to adjust its metabolism and sleep patterns to survive winter. Today, because we spend 90% of our time indoors and avoid sun exposure, we have effectively created a "perpetual winter" for our bodies, leading to widespread sleep dysfunction.

The Brainstem and Acetylcholine

One of the most critical revelations in the discussion is the role of the brainstem in sleep regulation. Dr. Gomenak discovered that vitamin D receptors are abundant in the brainstem, which controls our circadian timing. Specifically, vitamin D triggers the production of choline acetyltransferase, the enzyme required to create acetylcholine.

Acetylcholine is the neurotransmitter responsible for focus and alertness during the day, as well as the ability to transition into deep, restorative sleep at night. Without sufficient vitamin D, this cholinergic system falters, preventing the brain from entering the necessary phases of sleep. This explains why sleep is not just a passive state, but an "involuntary," time-locked event that the brain must actively coordinate.

The Microbiome Connection: The Missing Piece

While vitamin D is essential, Dr. Gomenak warns that supplementation alone is not a universal "cure-all." Her clinical experience revealed that after two years of vitamin D supplementation, many patients—including herself—began to experience new issues, such as joint pain and the return of sleep problems.

She identifies the intestinal microbiome as the vital missing link. The B-vitamin family (specifically B5/pantothenic acid) is largely produced by a healthy, diverse microbiome. When we take vitamin D without restoring the gut, we force the body into a B-vitamin deficiency state. Dr. Gomenak explains that these eight B-vitamins are essential co-factors for cellular repair. If the gut is not functioning correctly, the body cannot produce or process these building blocks efficiently, leading to systemic inflammation and sleep disruption.

A Path to Normalcy: Introspection and Patience

Dr. Gomenak advocates for a patient-centered approach that prioritizes introspection. She emphasizes that because every person’s microbiome is unique, there is no "one-size-fits-all" dose. Instead, individuals must:

  1. Prioritize natural inputs: Maximize sun exposure and time spent outdoors to allow the body to synthesize nutrients naturally.
  2. Monitor the body's feedback: Pay close attention to symptoms like burning in the hands/feet or agitation, which may signal an imbalance or an over-supplementation of B-vitamins.
  3. View sleep as a complex system: Recognize that sleep is a "carefully orchestrated, time-locked event" that requires the right chemical environment.

Ultimately, Dr. Gomenak’s work serves as a call to action to move away from "pithy, reductionist boxes" in medicine. By treating the body as a dynamic, interconnected system—where gut health, hormonal balance, and environmental alignment work in tandem—we can reclaim the natural, restorative sleep that our biology was designed to achieve.

🎯Key Sentences

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I'm so grateful for you tuning in with me today.
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Listen in and learn with her today.
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Dr. Gomenak, thank you so much for coming to hang out with us today.
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It was my pleasure.
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It's not really their fault.
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📝Key Phrases

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shed light on
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blown my mind
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first and foremost
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go a little bit deeper
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the bigger picture
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📖 Transcript

You are now listening to The Model Health Show with Shawn Stevenson.
For more, visit themodelhealthshow.com.
Welcome to The Model Health Show.
This is fitness and nutrition expert Shawn Stevenson, and I'm so grateful for you tuning in with me today.
What if you feel like you're doing everything right, but you are still struggling with sleep issues?
Dr Stasha Gomenek's groundbreaking study revealed how a key deficiency can contribute to a host of difficult sleep problems.

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