Released by the body during exercise, testosterone helps muscle cells rebuild. Although it was initially thought to be inactive, androstenedione quickly converts to an anabolic form after it enters the body. This supplement becomes a type of steroid that is designed to increase the amount of muscle-building testosterone in the body. Testosterone reaches the muscle cells through the blood stream. Androstenedione assists in this process.
Proteins make cells grow larger.
The greater amounts of testosterone present in the muscle cells, the more protein. Thus, the muscle cells tend to grow larger. The recommended 50-100 milligram dose increases testosterone levels up to 300 percent and lasts for about three hours. The idea is that increased testosterone production increases lean muscle mass and improves athletic performance. However, taking androstenedione is as dangerous as taking any other anabolic steroid.