D-Aspartic Acid (DAA)
Also: DAA · D-aspartate · sodium D-aspartate · d-aspartic acid
Largely overhyped — initial testosterone-boosting studies didn't replicate in trained men, and high doses may backfire.
Testosterone & hormonal load
D-aspartic acid is an amino acid involved in the hypothalamic-pituitary release of LH and in testosterone synthesis in the testes. An initial 2009 study in untrained men showed a 33% testosterone increase over 12 days. However, multiple subsequent well-controlled trials in resistance-trained men found no significant testosterone change, and one trial found a significant decrease at 6g/day. The compound appears ineffective for men with already-adequate testosterone levels.
Found in.
Two jurisdictions, two different verdicts.
Sold as a food supplement amino acid in EU. No specific restrictions.
Dietary supplement ingredient under DSHEA. No clinical guidance.
The receipts.
- [01]Topo et al. 2009 — D-aspartic acid and testosterone (PubMed)pubmed.ncbi.nlm.nih.gov/19860889/
- [02]Willoughby et al. 2013 — D-aspartic acid with heavy resistance training has no effect on testosterone (PubMed)pubmed.ncbi.nlm.nih.gov/24074738/
- [03]Willoughby et al. 2014 — Heavy resistance training with NMDA has no effect on serum hormones (PubMed)pubmed.ncbi.nlm.nih.gov/24570624/
Find D-Aspartic Acid (DAA) before it finds you.
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