Dr. Gominak's theory — that low vitamin D disrupts the gut microbiome, which then stops making enough B vitamins, which then breaks sleep — comes from a single practitioner who herself acknowledges the mechanism hasn't been confirmed by other research teams: an interesting lead, not (yet) established evidence.

noli's read

Named source: Dr. Stasha Gominak, a neurologist and author of two papers (2012, 2016) on the link between low vitamin D, sleep, and the gut microbiome, and creator of the commercial RightSleep program. Evidence type: a clinical hypothesis built from her own patient experience (several thousand cases), not a peer-reviewed randomized controlled trial specifically testing the proposed mechanism (vitamin D → four bacterial species → B-vitamin production → sleep). In the interviews reviewed, she herself acknowledges that, to her knowledge, no one has yet published a study confirming vitamin D as a growth factor for these specific gut bacteria. The role of brainstem vitamin D receptors and their link to acetylcholine production draws on genuine older work (Stumpf, 1980s), but the full chain through to sleep remains a personal clinical construct, not replicated by an independent research group to date. Direction: a plausible mechanistic hypothesis, not tested by an independent controlled trial.

the sources

1. 1NIH Office of Dietary Supplements 2026
2. 2Manson JE et al. 2019