Frontiers Pharmacokinetics, distribution, metabolism, and excretion of body protective compound 157, a potential drug for treating various wounds, in rats and dogs Christopher Mendias, PhD, gets four or five patient questions daily about peptides at his sports medicine practice in Phoenix, Arizona. BPC 157 is the most popular. That's because thousands of people are buying 15 amino acids. One of the most researched peptides in laboratory science right now. BPC 157 is a synthetic peptide derived from a sequence originally found in human gastric juice. It is short PEPTIDES , How BPC 157 actually works:, BPC 157 is a synthetic peptide derived from a protective compound naturally found in your stomach lining., Its a 15 amino acid sequence thats been studied