D-Aspartic acid is the form involved in the production and release of testosterone in the body. Because of this, it is often found in supplements that boost testosterone. These properties are ideal for all types of athletes, especially for fitness enthusiasts or regular gym-goers. Testosterone is responsible for the increase in muscle mass. This is because testosterone has an anabolic effect. Adequate levels of testosterone lead to an increase in protein formation, especially in bones and muscles, increasing muscle mass and strength. Additionally, testosterone increases levels of growth hormone, another hormone responsible for increasing muscle mass, helps reduce fatigue, and enhances performance. Ingredients 2 Capsules D-Aspartic Acid (DAA) 2000 mg Zinc Bisglycinate 33 mg Zinc 9.2 mg (92%*)