Myth-buster
Vitamin D supplementation didn't budge a key fertility marker in a meta-analysis of 992 women — the overall effect was null, though a subgroup hinted at a possible drop in women with already-high baseline AMH.
This is among the first meta-analyses on vitamin D for ovarian reserve, and while it found no overall benefit, the substantial heterogeneity in the studies means the question isn't settled — treat the null result as a strong caution, not the final word.
The meta-analysis pooled 992 reproductive-aged women and found that vitamin D supplements did not significantly change anti-Müllerian hormone (AMH) levels — a blood marker used to estimate remaining egg supply. Subgroup results suggested a possible small reduction in AMH among women with high starting levels, but the overall evidence is moderate and the studies varied a lot, so the finding should be viewed as preliminary.
Where this fits in the evidence
This is among the first studies we've indexed on Vitamin D for Changed Anti-Müllerian Hormone Level — treat it as an early signal until more research accumulates.
The study
- Meta-Analysis
- n = 992
- 2026-05-11
- Frontiers in endocrinology
This is a plain-language summary of a research finding, not medical advice. Pillser surfaces research signals to help you decide what's worth investigating — always consult a qualified professional before changing what you take.