đŹ AOD-9604 â Overview
AOD-9604 is a synthetic peptide fragment derived from the C-terminal region of human growth hormone (HGH) (specifically residues 176â191) that was developed to mimic the lipolytic (fat-breaking) effects of HGH without the broader growth-promoting effects like increasing IGF-1. It has been studied in research settings for fat metabolism, lipolysis, and adipocyte signaling, although clinical efficacy in humans hasnât been consistently demonstrated.
đ Brief Functional Description
- Modified fragment of human growth hormone designed to enhance fat breakdown and inhibit fat formation.
- Investigated primarily in preclinical and early human trials for lipolytic activity with minimal effects on glucose/IGF-1.
- Often referred to as the âfat-burning peptideâ in research literature.
đ§Ş Chemical & Structural Information
đ˘ CAS Number
- 221231-10-3 â widely accepted CAS for AOD-9604.
đ§Ź Amino Acid Sequence
- AOD-9604 is a 16-amino acid peptide (e.g., Tyr-Leu-Arg-Ile-Val-Gln-Cys-Arg-Ser-Val-Glu-Gly-Ser-Cys-Gly-Phe) with a disulfide bridge linking the two cysteines (commonly a cyclic structure).
âď¸ Molecular Formula
- CââHâââNââOââSâ â the elemental composition of the peptide fragment.
đ§Ş Molecular Weight
- ~1,815.1 g/mol (Da) â approximate molecular weight of the AOD-9604 peptide.
đ§Ź Chemical Structure
- AOD-9604 is a peptide, meaning its structure consists of amino acids linked by amide (peptide) bonds in the sequence shown above.
- The peptide also includes a 7â14 disulfide (cyclic) bond between the two cysteine residues, which stabilizes the folded peptide chain.
- A simplified structural depiction can be represented as:
(Connected peptide chain with standard side chains for each residue.)TyrâLeuâArgâIleâValâGlnâCys |ââââââdisulfide bridgeââââââ| CysâGlyâPheNote: The full 2D SMILES or InChI string for the intact peptide is extensive (163+ atoms) and reflects the full backbone plus the sulfurâsulfur bond and all side chains; this is consistent with the 16-amino-acid length.
đ§ Mechanism & Research Context
- AOD-9604 was designed to stimulate lipolysis (fat breakdown) and inhibit lipogenesis (fat creation) in adipose tissue without traditional growth hormone receptor activation.
- Animal studies showed enhanced fat oxidation and reduced fat accumulation, possibly through beta-adrenergic receptorârelated pathways.
- Human clinical data to date are limited and inconsistent, and its development was not completed as a therapeutic due to insufficient efficacy.
â ď¸ Additional Notes
- AOD-9604 is research-use-only in most contexts (not approved as a drug or supplement).
- It does not reliably raise IGF-1 or full HGH receptor activity, differentiating it from full growth hormone.

