AOD-9604 is a synthetic peptide fragment derived from human growth hormone (hGH), specifically the C-terminal region (amino acids 176–191). Unlike full-length hGH, AOD-9604 does not promote muscle growth or affect IGF-1 levels, but it retains fat-burning properties. It is primarily used to assist with weight loss, fat metabolism, and obesity management without the risks associated with traditional hGH therapy.