Health claim
“Daily intake of 400 IU of vitamin D can improve sperm motility by up to 30% in men with low baseline levels.”
Claim checked — mixed / earlyMedium risknutrition
Evidence Summary
Some evidence supports this, but findings are inconsistent or limited in scope.
Limited small studies suggest vitamin D supplementation may modestly improve sperm motility in men with deficiency, but findings are inconsistent and not confirmed by larger trials.
Extracted from
Why Male Fertility Is Declining Drastically | Dr. Shanna Swan & Dr. Andrew HubermanHuberman Lab Clips
Dr. Shanna Swan and Dr. Andrew Huberman discuss the documented decline in male sperm counts, its potential health implications, and factors that may influence fertility.
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