Testosterone boosters work in two ways first by actively stimulating the production of testosterone second these supplements work by blocking other hormones from converting testosterone to estrogen one key byproduct of increased free testosterone is increased protein synthesis which is essentially the process of anabolic growth this triggers faster muscle development and harder lean muscle mass as well as increased basal metabolic rate leading to less fat and harder muscles ingredients of vitolast this muscle growth supplement features an array of natural extracts formulated to boost tlevels and optimize workouts first on the ingredient list is ksm ashwagandha extract this is a very interesting addition to the formula as it is an ingredient more rarely seen in bodybuilding supplements the product website states that it is effective in upping the bodys resistance to stress boosting the immune system