D-aspartic acid (DAA) is an amino acid that has been suggested to increase testosterone levels in some research studies. More evidence is still needed to confirm if DAA definitively raises testosterone or not.
Some key points about DAA and testosterone:
- DAA is promoted as a testosterone booster in bodybuilding and fitness circles. It's said to work by stimulating the release of luteinizing hormone (LH), which signals the testes to produce more testosterone.
- Several research studies have found that DAA supplements increased testosterone levels in both animal and human models:
- A 2009 study gave DAA supplements to a group of men between 27-37 years old who did resistance training. After 12 days, their testosterone levels increased by 42% on average.
- Another study from 2009 gave DAA supplements to a group of fertile and infertile men between 22-44 years old. After 90 days, both groups experienced increased testosterone levels.
- Multiple studies in rats have also demonstrated that DAA supplementation increases testosterone.
- However, other studies show no increase in testosterone from DAA supplementation:
- A 2013 study found that 3 grams of DAA per day for 28 days did not significantly increase testosterone or LH levels in young men.
- Another study in rugby players taking 3 grams per day also found no effect on testosterone or performance.
- One hypothesis is that DAA may only increase testosterone in those with fertility issues or already low testosterone levels. However, more research is still needed.
- The dose and duration of DAA supplementation differs quite substantially across studies from 2-3 grams per day for 2 weeks up to 3 months. The optimal dose is still unknown.
- Currently, evidence overall is mixed on whether DAA supplementation reliably increases testosterone. More research is still needed on optimal dosing strategies and which populations may benefit.
In summary, while early research shows promise, further evidence is still needed to confirm if DAA acts as a testosterone booster, especially for healthy young men without fertility issues. Those struggling with low testosterone or reproductive health may be more likely to see benefits from DAA supplementation. Speak to your
