The putative effects of D-Aspartic acid on blood testosterone levels: A systematic review
Roshanzamir F, Safavi SM
Published in International Journal of Reproductive Biomedicine
Methodology
Systematic review of 23 animal and 4 human studies of D-aspartic acid and serum testosterone, searched to October 2015
Key Findings
Effects were species- and tissue-dependent in animals, while the small human literature showed inconsistent testosterone responses, including no effect in trained men.
Conclusions
Evidence does not support D-aspartic acid as a reliable testosterone booster in humans.
Limitations
Few human trials; small samples; heterogeneous doses and populations; no meta-analysis.
Supplements Studied
In vivo and in vitro animal studies revealed the effect of D-Asp depending on species, sex and organ-specific.
Related Health Concerns
Study Details
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Disclosures
Funding
Not reported
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