📚 Wiki Weight Loss & Metabolic AOD-9604

AOD-9604

◎ Phase IIb (Metabolica Pharmaceuticals)
Anti-Obesity Drug 9604 (GH Fragment 176-191)
Also known as: AOD9604, GH Fragment 176-191, hGH Frag 176-191, Tyr-hGH(177-191)
Brand names: Tev-Tropin fragment (historical)
Page last reviewed

Quick Summary

AOD-9604 (Anti-Obesity Drug 9604) is a synthetic fragment of human growth hormone (hGH), specifically the C-terminal region spanning amino acids 176-191 with an additional tyrosine at position 177. It was designed to isolate the fat-metabolizing properties of hGH without the IGF-1-raising, anabolic, or diabetogenic effects of full-length GH.

Metabolic & Mitochondrial Phase IIb (Discontinued)
AOD-9604 (Anti-Obesity Drug 9604) is a synthetic fragment of human growth hormone (hGH), specifically the C-terminal region spanning amino acids 176–191 with an additional tyrosine at position 177. It was designed to isolate the fat-metabolizing properties of hGH without the IGF-1-raising, anabolic, or diabetogenic effects of full-length GH. Metabolica Pharmaceuticals advanced it through Phase IIb clinical trials for obesity before discontinuing development due to modest clinical results.
Storage Stability
Lyophilized
1–2 years (-20°C)
Reconstituted
N/A (oral)
Room temp
Stable (capsule)

Mechanism of Action

Lipolytic Activity

AOD-9604 stimulates lipolysis (fat breakdown) in adipocytes through beta-3 adrenergic receptor-independent pathways, mimicking the fat-burning activity of endogenous hGH without requiring GH receptors.

No IGF-1 Stimulation

Unlike full GH, AOD-9604 does not bind the hepatic GH receptor that triggers IGF-1 production. This means no anabolic muscle-building effect, no insulin resistance, and no concern about acromegaly at research doses.

Lipogenesis Inhibition

In vitro data shows AOD-9604 inhibits the conversion of non-fatty food sources into fat (lipogenesis) and accelerates beta-oxidation of stored fatty acids.

Research Summary

Phase IIb Clinical Trial

In a 24-week randomized controlled trial, oral AOD-9604 (1 mg/day) produced ~2.8 kg greater weight loss than placebo in obese subjects. While statistically significant, the effect size was deemed commercially insufficient and development was halted.

Subcutaneous vs. Oral

Subcutaneous administration produces higher bioavailability than oral. Most research-use protocols favor SubQ injection at 250–500 µg.

Fasted State

Fat mobilization is enhanced when dosed in a fasted state, typically morning before food.

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Research Protocols

Standard SubQ Protocol

300 µg subcutaneously, once daily, in the morning fasted. Some protocols use 500 µg split into two doses.

Oral Protocol

1 mg orally daily (clinical trial dose). Lower oral bioavailability requires higher dose than SubQ equivalent.

Stack Compatibility

Often combined with MOTS-c or 5-Amino-1MQ for additive metabolic effects. Does not interfere with insulin-sensitizing compounds.

Storage & Handling

Store lyophilized" class="wiki-gloss-link">lyophilized powder at -20°C for long-term. Reconstitute with bacteriostatic water. Store reconstituted solution at 2–8°C and use within 30 days. Discard if solution appears cloudy.


References

  • [1]Heffernan M, et al. "The effects of human GH and its lipolytic fragment on adipose tissue." Endocrinology, 2001.
  • [2]Ng FM, et al. "Metabolic studies of a GH fragment." J Clin Endocrinol Metab, 1990.
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Verified Scientific Data Last audited:
Data Sources & External References
CAS Registry: 221231-10-3  ·  Molecular Formula: C78H123N23O23S2  ·  Source: peer-reviewed literature  ·  Domain: ascendpeptide.org
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