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Mary Claire Haver, MD@drmaryclaireInstagram

A menopausal woman has a 60 to 80% risk of having low vitamin D. Eating foods rich and vitamin D is

… more

what it claims

Menopausal women have a high risk (60 to 80%) of vitamin D deficiency; it is therefore recommended to check your blood levels via a medical analysis rather than relying solely on diet.

holds up

The high prevalence of vitamin D deficiencies in menopausal women is widely documented in scientific literature, particularly due to metabolic changes and often reduced sun…

noli's read

The high prevalence of vitamin D deficiencies in menopausal women is widely documented in scientific literature, particularly due to metabolic changes and often reduced sun exposure (observational studies, Endocrine Society). The advice to prioritize a blood test rather than indiscriminate supplementation is a prudent and rigorous approach, as serum dosage allows for adjusting intake to actual needs and avoiding excess. The assertion that dietary absorption alone is often insufficient is scientifically supported, as very few foods contain significant amounts of vitamin D. This content presents no notable exaggeration; it encourages a practice of preventive medicine based on biology rather than assumption. There is no miraculous promise here, but rather a pragmatic recommendation for monitoring bone and metabolic health.

the sources

Claimed by Mary Claire Haver, MD. Noli grades the claim, never the person.

Decoded by Noli · July 18, 2026 · the original post

What the graded evidence says

Effect: CVD/cancer prevention in replete adults (VITAL) — no significant reduction
Measured on: VITAL: 25,871 adults

Great for correcting a deficiency; weak as a general preventive if you're already replete.

Mary Claire Haver, MD in the Register58 claims graded · solidity 89/100See their record →

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Others on this

The buzz from a Monster Energy comes almost entirely from its caffeine (and the sugar riding along with it) — the taurine and the B-vitamin megadoses on the can don't add a proven benefit beyond that.

mixedscience.snitch

Extreme, prolonged sun deprivation — like months aboard a nuclear submarine — is exactly the scenario where routine vitamin D supplementation makes real sense: several studies on submarine crews (Royal Navy, US Navy) show levels drop markedly within weeks without it.

holds upPaul McNally

For women in their 20s: four basics are enough — omega-3, vitamin D3, magnesium glycinate, and a quality probiotic — rather than 15 supplements.

mixedThebiohackingrn

Noli has read similar claims

Other advice in the Register that leans on the same research.

Extreme, prolonged sun deprivation — like months aboard a nuclear submarine — is exactly the scenario where routine vitamin D supplementation makes real sense: several studies on submarine crews (Royal Navy, US Navy) show levels drop markedly within weeks without it.

holds upPaul McNally

For women in their 20s: four basics are enough — omega-3, vitamin D3, magnesium glycinate, and a quality probiotic — rather than 15 supplements.

mixedThebiohackingrn

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.

not provenThe Diary Of A CEO

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