Pure IGF-1 May increase new muscle cells May increase fat loss Can be cycled year around 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. A molecular biological technique is used 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