AOD9604 is a synthetic fragment of human growth hormone, specifically the last 15 amino acids of HGH (residues 176-191). Researchers have studied it for its potential to affect fat metabolism without producing the full effects of growth hormone. It went through human clinical trials for obesity but did not achieve the endpoints needed for approval.
Fat Metabolism Research
AOD9604 was developed based on findings that a specific region of the HGH molecule drives fat breakdown (lipolysis) without the growth-promoting or blood sugar effects of the full hormone. Animal studies showed dose-dependent fat reduction. Human trials were conducted.
Obesity Clinical Trials
Phase 2 and phase 3 clinical trials in overweight and obese humans were completed. While early phase 2 data showed some signals, the larger phase 3 trial did not meet its primary endpoints for weight loss, leading the developing company to discontinue the weight loss program.
Cartilage and Joint Research
After the weight program was halted, researchers explored AOD9604 for cartilage repair and osteoarthritis applications. Some preclinical work suggested it might support cartilage regeneration, and it received GRAS (Generally Recognized As Safe) status in the US for certain food uses.
Stimulates lipolysis in animal models without the insulin-disrupting effects of full HGH.
Phase 3 human obesity trial did not meet primary weight loss endpoints.
Some preclinical signals for cartilage and joint tissue support, though clinical evidence is limited.
GRAS status granted in the US for use as a food ingredient at low concentrations.
The most important context for AOD9604 is that it went through full human clinical trials for obesity and did not meet its primary endpoints. The development program was discontinued for that indication. While it remains studied for other applications, the human trial failure is significant context. Animal lipolysis data did not translate into meaningful weight loss in the human trial.
Human growth hormone does several things at once — it promotes tissue growth, affects blood sugar, and also stimulates the breakdown of fat. Researchers identified that the lipolytic effect appears to come primarily from a specific region of the HGH molecule. AOD9604 is a synthetic copy of that specific fragment, designed to activate the fat-breakdown pathway through what is believed to be a beta-3 adrenergic receptor interaction, while avoiding the growth and blood sugar effects of the full HGH molecule. The idea was to get the metabolic benefit without the risks of full HGH. In practice, the human trials did not demonstrate the weight loss effect that was hoped for.
AOD9604 was tested in human clinical trials and was generally well-tolerated. It received GRAS designation in the US for food use, reflecting a favorable safety assessment at certain concentrations. It is not approved as a medication for any indication. The phase 3 trial failure means it lacks an established clinical use case for weight management.
Preliminary
Most evidence comes from preclinical studies and case reports. Human data is limited and more research is needed.
Published Research Ranges
250–500mcg daily in research studies
Research Context Only: These are ranges reported in published scientific studies for educational reference. They are not dosing recommendations. This is not medical advice. Always consult a qualified healthcare professional.
Sources listed here are from the platform research library. All links open the original publication. No citations are generated by AI.
AOD9604: Safety and Pharmacokinetics of an Anti-Obesity Drug in Obese Males
International Journal of Obesity • 2001
• DOI: 10.1038/sj.ijo.0801625
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Research Education Only: This profile is for educational purposes only. All information is sourced from published scientific literature. This is not medical advice. Not for human consumption. Consult qualified medical professionals for any health decisions.
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