D-Aspartic Acid is one of two forms of the amino acid aspartic acid.
D-Aspartic Acid has been used by older men and athletes to temporarily raise their testosterone levels. Raised testosterone levels can lead to increased vitality, muscle growth, better sex life and more. Elevated testosterone levels only last a week to a week and a half in healthy men, with testosterone returning to normal afterward.
D-Aspartic Acid works in brain to cause a release of hormones, such as luteinizing hormone, follicle-stimulating hormone, and growth hormone. It may also build up in the testicles, where it alleviates a rate-limiting step of testosterone synthesis, which leads to a testosterone increase.