D-Aspartic Acid
D-aspartic acid is involved in the regulation of certain hormones, among which the main anabolic hormone is testosterone. In addition, this amino acid has a positive effect on the production of growth hormones. Thus, it helps to increase muscle strength and mass.
D-Aspartic acid to boost testosterone 
D-aspartic acid, or DAA, has recently appeared on the sports nutrition market and is already proving its effectiveness in maintaining the natural level of testosterone in the body. Recent studies have confirmed that this acid helps to increase the level of testosterone and luteinizing hormone (LH) (which has a direct effect on the production of testosterone) in the body of men.
In one study, taking aspartic acid for 12 days resulted in a 33 percent increase in LH and testosterone levels in male subjects. At the same time, experiments have shown that the longer the DAA is taken, the better the effect of its reception. Moreover, many such experiments were conducted, and their results were similar to the above data.
D-Aspartic advantages
The consumption of aspartic acid is a safe and effective way to maintain the natural level of testosterone in the body within the normal range and provides a lot of benefits to any male athlete who trains. First, testosterone directly affects protein synthesis. This improves the body's ability to repair damaged muscle fibers and build up pure muscle mass since the body is able to produce enough protein at high testosterone levels.
Moreover, a healthy level of testosterone in the body helps to get rid of excess fat deposits, as the body is able to consume more fat as a source of energy. Testosterone also suppresses the production of cortisol, which is especially important, because cortisol not only leads to the accumulation of extra pounds in the abdominal area but also provokes the breakdown of muscle mass.
Finally, a high natural level of testosterone in the body is particularly important for any male athlete as a source of strength and energy, which means an increase in muscle mass and fat burning.