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Amino acid that may stimulate luteinizing hormone and testicular testosterone release via the hypothalamic-pituitary-gonadal axis.
Evidence does not support DAA as a testosterone booster in healthy, trained men. While an early study in untrained men suggested a transient rise, a 12-week randomized controlled trial in resistance-trained men found no change in total or free testosterone at 6 g/day, and a separate trial found 6 g/day actually decreased total testosterone (~12.5%) and free testosterone, with no performance benefit. The weight of controlled evidence is null-to-negative.
Studied at 3-6 g/day; higher doses (6 g/day) have been associated with reduced rather than increased testosterone in trained men, so it is not recommended for this purpose.
Educational summary of doses studied — not a recommendation. Talk to a clinician before starting any supplement.
Educational summary of published research, checked against primary sources and linked inline. Not medical advice; supplements are not FDA-evaluated to treat disease. See our editorial policy.