Claims › Testosterone boosters
Does D-aspartic acid raise testosterone?
It rose in one short study. In men who lift, nothing, and at a higher dose, total testosterone went down.
#7 of 12 in 12 Testosterone Boosters, Ranked by What's Actually Been Tested
What the human studies found
- In 2009, 23 men took it for 12 days, and their testosterone rose.
- In resistance-trained men, after 28 days of heavy training: no change.
- In another trial, at the higher of two doses, total testosterone went down. Who took part changed the answer.
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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