IGF-1 is a naturally occurring anabolic hormone, and growth hormone (HGH) also acts through IGF-1. The two commonly used hormones associated with IGF-1 are IGF-1 LR3 and des(1-3)IGF-1, and to understand the relationship between these three, we also need to understand another hormone associated with IGF-1, IGFBP. IGF-1 IGF-1, short for insulin-like growth factor 1, also known as growth regulator …