The Shocking Connection Between Vitamin D & Sleep - With Dr. Stasha Gominak

What It Covers

Neurologist Dr. Stasha Gominak explains how vitamin D functions as a steroid hormone — not a vitamin — that directly regulates sleep through acetylcholine production in the brain stem. Her clinical research across thousands of patients reveals that vitamin D deficiency disrupts the microbiome, depletes B vitamins, and creates a cascading sleep disorder epidemic tied to reduced sun exposure.

Key Questions Answered

• •Vitamin D as hibernation hormone: Vitamin D is a secosteroid hormone, not a vitamin, and functions as the body's seasonal signal. As levels rise with sun exposure, thousands of genes activate for repair and muscle building. As levels fall, metabolism slows and sleep lengthens to conserve energy. Gene expression studies show 50 genes activate at 2,000 IU daily versus 2,000 genes at 11,500 IU daily.
• •Acetylcholine as the sleep-wake bridge: Vitamin D triggers production of choline acetyltransferase, the enzyme that synthesizes acetylcholine. This single neurotransmitter runs both daytime focus (via frontal lobe centers) and nighttime deep sleep paralysis (via brain stem centers). Low vitamin D means insufficient acetylcholine, which explains why people struggle to enter restorative sleep phases even when spending adequate hours in bed.
• •The two-year supplementation failure pattern: Patients given vitamin D supplementation alone improved sleep initially, then regressed at the two-year mark with new symptoms including joint pain, burning hands and feet, and returning insomnia. Gominak identified this as B vitamin depletion — vitamin D increases cellular repair demand, exhausting B vitamins that a compromised microbiome can no longer produce in sufficient quantities.
• •B vitamin dosing is dose-sensitive and microbiome-dependent: Taking 400mg pantothenic acid (B5) alone caused agitation and worsened insomnia in most patients, while a B-100 complex (100mg of all eight B vitamins) resolved pain within one day. The eight B vitamins are bacterial growth factors produced by four symbiotic gut microbiome phyla. Supplementing the full B-100 complex for approximately three months helps restore the microbiome to self-sufficient B vitamin production.
• •Microbiome restoration protocol sequence: Gominak's Right Sleep protocol requires three steps in order: optimize vitamin D blood levels through testing (available without a doctor in the US), supplement a B-100 complex for roughly three months to rebuild microbiome function, then reduce to a lower-dose B-50 or multivitamin as the microbiome resumes production. The signal to stop supplementing is the return of sleep disruption or pain, indicating the microbiome is now producing adequate B vitamins independently.
• •Outdoor exposure outperforms supplementation for prevention: No supplement replicates the full spectrum of wavelengths received outdoors. Vitamin D skin synthesis requires direct UVB contact, but additional benefits — circadian synchronization, metabolic signaling, and mood regulation — come from the broader light environment. Even sitting on an open patio without direct sun provides measurable benefit. Gominak recommends prioritizing outdoor time as the primary intervention, with supplementation reserved for those already deficient.