Peptable

Comparison

AOD-9604 vs Tirzepatide

Function

While AOD-9604 is studied as an anti-obesity peptide that can reduce weight gain and increase fat oxidation in obese animal models with generally neutral effects on IGF-1 and glucose metabolism in early human trials71111115, Tirzepatide is approved for type 2 diabetes and obesity, producing larger HbA1c and body-weight reductions than semaglutide in head-to-head trials24.

Mechanism

While AOD-9604 works as a synthetic fragment of human growth hormone corresponding to residues 176–191 with an added N-terminal tyrosine, retaining lipolytic but not growth-promoting actions; proposed to stimulate lipolysis and inhibit lipogenesis in adipose tissue, partly via β3-adrenergic pathways without significantly activating the full GH receptor–IGF-1 axis6171111, Tirzepatide is a 39-amino-acid synthetic peptide primarily based on GIP sequence with C20 fatty diacid conjugation that acts as a dual agonist at GIP and GLP-1 receptors, enhancing glucose-dependent insulin secretion, suppressing glucagon, delaying gastric emptying, and reducing appetite24.

Receptor

AOD-9604

Acts indirectly on adipocytes, with mechanistic work implicating β3-adrenergic receptor–linked signaling in fat metabolism rather than direct GH receptor activation71111

Tirzepatide

Glucose-dependent insulinotropic polypeptide receptor (GIPR) and GLP-1 receptor (GLP1R) 24

Organism or Origin

AOD-9604

Synthetic peptide fragment derived from human pituitary growth hormone (GH1 protein) 111107114

Tirzepatide

Synthetic dual GIP/GLP-1 receptor agonist modeled on human incretin hormones2480

Gene

AOD-9604

GH1

Tirzepatide

Not assigned in the current dataset.

Summary

Both peptides fall into a similar broad context as Metabolic peptide and Hormone peptide, although the details of how they are used and discussed still diverge. Both are most often discussed in Metabolic and endocrine, which gives the comparison a meaningful common setting even when the rest of their profiles are not identical. Both appear to work through Hormone analog, but the functional emphasis still separates, with AOD-9604 leaning toward Lipolysis and fat loss and Tirzepatide leaning toward Metabolic regulation. Both are synthetic in origin and their development context also differs, with AOD-9604 in Preclinical development while Tirzepatide is approved. AOD-9604 takes the form of a linear peptide, whereas Tirzepatide is closer to a peptide conjugate, Tirzepatide incorporates lipidation and d-amino acid substitution features that are not part of AOD-9604; while their sequence patterns also diverge, with AOD-9604 showing hydrophobic domain features and Tirzepatide showing alpha-helical domain features.

Sources

61AOD-9604 – hGH 176–191 Analog Research Peptide ..., https://www.polybiotech.co/products/aod-9604-5mg
71Body-Fat Metabolism: AOD-9604 & GH Fragment 176–191 - Tide Labs, https://tidelabs.co.uk/blogs/articles/aod-9604-gh-frag-176-191-research-on-body-fat-metabolism
107Growth hormone 1 - Wikipedia, https://en.wikipedia.org/wiki/Growth_hormone_1
111Effects of Human GH and Its Lipolytic Fragment (AOD9604) on Lipid ..., https://academic.oup.com/endo/article/142/12/5182/2988749
114GH1 growth hormone 1 GH GH-N GHN IGHD1B hGH-N, https://www.sigmaaldrich.com/US/en/genes/gh1
115Peptide Spotlight: AOD 9604 - The Wellness Lounge, https://www.akwellnesslounge.com/blog/peptide-spotlight-aod-9604
24Tirzepatide - a dual GIP and GLP-1 (GLP1) receptor agonist, https://gpnotebook.com/pages/diabetes-and-endocrinology/tirzepatide-a-dual-gip-and-glp-1-glp1-receptor-agonist
80GLP-1 Localisation and Proglucagon Gene Expression in ..., https://pmc.ncbi.nlm.nih.gov/articles/PMC6200298/