AOD-9604

AOD-9604 is a synthetic modified fragment of the human growth hormone (hGH) molecule, specifically comprising amino acids 176 to 191 with an additional tyrosine residue at the N-terminus. Specifically, it was engineered to isolate the lipolytic properties of full-length hGH while eliminating unwanted metabolic side effects.

In contrast to full-length human growth hormone, AOD-9604 does not stimulate cell proliferation or trigger hyperinsulinemia. Mechanistically, preclinical studies demonstrate its ability to stimulate lipolysis—the breakdown of stored fat—while simultaneously inhibiting lipogenesis within adipose tissue.

Consequently, research suggests that AOD may interact directly with $\beta_3$-adrenergic receptors on adipocytes, which helps explain its targeted effects on body composition. In addition, scientists have examined its regenerative properties in bone and cartilage repair models, indicating biological actions beyond its primary metabolic scope. Overall, its selective mechanism makes AOD a compound of strong interest for researchers studying obesity, metabolic syndrome, and targeted growth hormone fragment pharmacology.