What Is AOD-9604?
AOD-9604 is a synthetic peptide based on a small fragment (amino acids 176–191) of human growth hormone. The idea behind it was to isolate the part of growth hormone thought to help break down fat—without growth hormone's effects on blood sugar or tissue growth.
It's widely marketed online and in some wellness clinics as a "fat-burning peptide."
What Does the Research Show?
In animals: Early lab and animal studies suggested AOD-9604 could increase fat breakdown and reduce fat buildup.
In humans: The results were disappointing. AOD-9604 was tested in clinical trials as an obesity treatment in the early 2000s. While early, smaller studies hinted at modest effects, a larger trial did not show meaningful weight loss compared with placebo, and development as an obesity drug was stopped.
In short, there's no strong evidence that AOD-9604 causes significant fat loss in people.
Is It Safe?
Studies that were conducted didn't identify major safety concerns at the doses tested, and the peptide doesn't appear to raise IGF-1 like growth hormone does. However:
- Long-term safety data is limited
- Products sold online as "research peptides" are unregulated and may be contaminated or mislabeled
- Injectable products carry risks if not made under sterile conditions
Regulatory Status
AOD-9604 is not FDA-approved as a drug. Its status for compounding has been under review and has changed during 2026, and it's not settled. Peptide regulations have changed several times in 2026, so a provider can help you understand current rules.
What Works Better for Fat Loss?
If your goal is fat loss, approaches with strong evidence include:
- Nutrition focused on protein, fiber, and whole foods
- Strength training and regular activity
- Quality sleep
- FDA-approved medications like semaglutide or tirzepatide when appropriate
Learn more about provider-guided weight loss here: Heva Weight Loss
The Bottom Line
AOD-9604 showed promise in early studies, but human trials didn't find meaningful fat loss. For now, it's more hype than proven help—and evidence-based options are far more reliable.