Could vitamin d boost fertility? new study investigates
NCT ID NCT05050916
First seen Jun 27, 2026 · Last updated Jul 01, 2026 · Updated 1 time
Summary
This completed Phase 2 trial looked at whether vitamin D supplements affect hormones linked to healthy menstrual cycles. Nearly 1,000 women aged 19-40 with natural cycles took either high-dose vitamin D (50,000 IU/week) or a placebo for about 3 months. Researchers measured hormone levels in urine and blood to see if vitamin D improves ovulation and fertility indicators.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
Active substance
Vitamin D (cholecalciferol)
What this could lead to
If it works, this could show that vitamin D helps regulate menstrual cycles, potentially improving fertility understanding.
What could go wrong
This is a completed Phase 2 trial, so results are preliminary. The study is observational in nature and does not test a treatment for infertility directly.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Contacts and locations
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Locations
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Henry Ford Health System
Detroit, Michigan, 48187, United States
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NIEHS Clinical Research Unit (CRU)
Research Triangle Park, North Carolina, 27709, United States