Claims › Testosterone boosters
Does vitamin D raise testosterone?
Two placebo-controlled trials found no effect, in men with normal or low testosterone.
#5 of 12 in 12 Testosterone Boosters, Ranked by What's Actually Been Tested
What the human studies found
- In 2011, overweight men who were low in vitamin D took it for a year, and their testosterone rose compared with baseline.
- Then two placebo-controlled trials in Austria: healthy men with normal testosterone, no effect; men with low testosterone, no effect either.
- The most-studied booster in the 2024 review (10 studies). It wasn’t one of the exceptions.
The studies (3)
The anchor source is a 2024 systematic review by a team of urologists (Morgado et al., International Journal of Impotence Research). They looked at 52 studies covering 27 proposed testosterone boosters. Their conclusion: most fail to increase total testosterone.
Watch all 12, ranked: the film on YouTube · 6:44If you're worried your testosterone is genuinely low, the test isn't a supplement: it's a blood test, and a conversation with a doctor. This is an investigation of the claims, not a guide to taking them.
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