The effects of d-aspartic acid supplementation in resistance-trained men over a three month training period: A randomised controlled trial
Melville GW, Siegler JC, Marshall PWM
Published in PLoS One
Methodology
Randomised, double-blind, placebo-controlled trial of 6 g/day D-aspartic acid versus placebo alongside 12 weeks of supervised periodised resistance training in trained men aged 18-36
Key Findings
Three months of D-aspartic acid did not raise basal testosterone in resistance-trained men.
Conclusions
Longer-term supplementation confirms the absence of a testosterone or performance benefit in trained men.
Limitations
Small sample; trained men only; single 6 g dose regimen.
Supplements Studied
Research on d-aspartic acid (DAA) has demonstrated increases in total testosterone levels in untrained men, however research in resistance-trained men demonstrated no changes, and reductions in testosterone levels.
Related Health Concerns
Study Details
Access Study
Disclosures
Funding
Not reported
This information is for educational purposes only. Always consult a healthcare professional before starting any supplement regimen.