Real, pure IGF-1. With the successful extraction of insulin-like growth factor type 1 from whey protein, SST-1: IGF is a revolutionary discovery for all athletes. Blackstone Labs used a molecular biological technique to extract 175 ug/100g, which is a substantial amount of IGF-1. Blackstone Labs has found a way to make this revolutionary compound affordable with the development of efficient extraction methods from whey peptides for the production of IGF-1. An IGF-1 precursor and growth hormone mimic, SST-1: GH will increase and develop new muscle. If improved sense of well being, increased muscle mass and protein synthesis, increased lean muscle, higher energy levels, increased endurance, increased flexibility, increased libido (sexual performance) and improved immune function are your goals - then SST-1: GH from Blackstone is just what the doctor ordered!