For research and educational purposes only. PepTalk discusses what researchers study in laboratory settings — not medical advice. Products are sold for laboratory research use only.
Research Peptide
AOD-9604
A growth-hormone fragment studied for fat metabolism — freeze-dried, ultra-pure, ready to reconstitute.
For research and educational purposes only. PepTalk discusses what researchers study in laboratory settings — not medical advice. Products are sold for laboratory research use only.
The short version
AOD-9604 is a small synthetic peptide copied from the tail end of human growth hormone — specifically residues 177–191, with one stabilizing tweak at the front. The interesting part is what it leaves out: researchers study it because it carries the fat-metabolism side of growth hormone while leaving the growth and blood-sugar effects behind.
What researchers are looking at
Growth hormone does a lot of different jobs at once — it tells the body to grow, it shifts blood sugar, and it nudges fat cells to release stored fat. AOD-9604 is a fragment of that larger hormone, and in lab models it appears to keep only that last job: stimulating fat breakdown (lipolysis) while holding back fat storage.
What draws scientific attention is the separation. Because the fragment lacks the binding regions needed to switch on the full growth-hormone receptor, researchers observe that it does not raise IGF-1 and does not appear to disturb glucose or insulin sensitivity — the two effects that complicate studying whole growth hormone. In the literature, this is framed as isolated lipolytic activity without the broader anabolic signaling.
Most of this evidence comes from animal and test-tube work, where the fragment has been shown to act on fat tissue directly through β3-adrenergic pathways. The findings are best read as what researchers measure in these models rather than proven human outcomes — though AOD-9604 is unusual in this class for having also been carried into human obesity trials.
Fat release stimulated
In models, the fragment engages β3-adrenergic receptors on fat cells and drives lipolysis — the breakdown of stored fat.
Fat storage held back
At the same time, lipogenesis — the laying down of new fat — is inhibited within the adipocyte.
Growth signaling left out
Without the full receptor-binding domains, it raises no IGF-1 and leaves glucose and insulin sensitivity unchanged in studies.
Where the evidence stands
an honest mapConsistent fat-loss data in obese animal models
Reached Phase 2/3 human obesity trials
From the lab toward the clinic
AOD-9604 went further than most fragments in this class: it advanced into Phase 2 and Phase 3 human obesity trials, and later received FDA GRAS (Generally Recognized As Safe) designation — placing it well beyond purely preclinical compounds in how far the human data has been carried.
At a glance
What it is
A GH fragment
residues 177–191
Studied for
Fat metabolism
lipolysis in models
What it skips
No IGF-1 rise
no growth/glucose effects
Research stage
Human trials reached
Phase 2/3; FDA GRAS
How it arrives
Lyophilized powder
Ships freeze-dried for stability and shelf life. Before research use, it's reconstituted with bacteriostatic water. Once reconstituted it degrades easily if agitated, so it's handled gently and kept refrigerated.
Bacteriostatic water
Needed to reconstitute
Certificate of analysis
Common questions
All products on FastPeps are labeled Research Use Only (RUO), and this is a legal requirement, not just fine print. It means these compounds are sold strictly for scientific research and laboratory purposes, not for personal use, self-administration, or medical treatment. This label exists because these compounds have not completed the FDA approval process to be sold as drugs or supplements. When you purchase from FastPeps, you are agreeing the product is for research purposes only.
For laboratory and research use only. Sold exclusively for in-vitro research and laboratory experimentation. Not a drug, supplement, or article intended for human or veterinary use; nothing here is medical advice or a claim of therapeutic benefit. Statements describe findings from published research.
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