Supplement Science
D-Aspartic Acid: Does DAA Actually Boost Testosterone?
Once a popular T-booster ingredient — here's what the conflicting evidence actually says.
6 min read · XT Editorial Team · Reviewed & updated
The original hype
Early studies in untrained men showed acute testosterone increases from 3 g/day of DAA. Follow-up trials in trained men showed neutral or even negative effects.
Where it fits
DAA is no longer a first-line ingredient. Most reputable formulas have dropped it in favor of zinc, magnesium, vitamin D, and ashwagandha.
Frequently asked questions
- Should I take DAA?
- For most trained men, no — better-evidenced options exist.
- Any side effects?
- Generally mild GI upset; some men report increased estradiol.
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