Test Psi is perfect for the male who wants to start gaining lean muscle mass while decreasing body fat. D-Aspartic acid is the main active ingredient making it extremely efficient for strenght, power, faster recovery and more desire to workout. Test Psi has a build in estrogen blocker that helps reduce body fat and excess water weight. Expect to build 2-3lbs of lean hard muscle while possibly decreasing the same amount in body fat.