Peptides are short chain amino acid monomers linked by a peptide bond. The body utilizes these short amino acids chains to secrete/pulse growth hormone (GH) that is already stored in your body. This is a very attractive option for those who are not able to utilize synthetic human growth hormone (HGH) naturally. In fact, this could even be a safer alternative for those seeking to use growth hormone for recovery, anti-aging and fat-loss. There are a multitude of peptides on the market and new ones being created almost monthly. Therefore, for the sake of an overview, let me just touch upon the ones that are most commonly used. To begin, let me start by first breaking down the two most important peptide groups for bodybuilding.