Metabolic Investigational

AOD-9604

Also known as: Advanced Obesity Drug, HGH Fragment 176-191 (Modified), Tyr-hGH 177-191

A modified HGH fragment that isolates growth hormone's fat-burning action without IGF-1 elevation, growth effects, or insulin resistance.

Popularity B+
Class HGH Fragment (Lipolytic Peptide)
Half-Life ~30 minutes
Form Lyophilized powder
View Vendors → Jump to Dosing ↓
AOD-9604 C78H125N23O23S2
Research-Backed User Reports Sourced Updated Mar 2026
// Overview

What is AOD-9604?

AOD-9604 (Advanced Obesity Drug) is a synthetic peptide analog of the C-terminal fragment of human growth hormone (amino acids 176-191). It was developed by Metabolic Pharmaceuticals in Australia to isolate the fat-burning properties of growth hormone while eliminating its growth-promoting, IGF-1-elevating, and insulin-resistance-inducing effects.

The peptide mimics the lipolytic (fat-burning) action of natural HGH by stimulating the beta-3 adrenergic receptor pathway and inhibiting lipogenesis (fat formation). In clinical trials, AOD-9604 demonstrated statistically significant fat loss without affecting blood sugar levels, IGF-1 levels, or causing other HGH-related side effects.

Although its clinical development for obesity was discontinued after Phase 2b trials showed modest overall weight loss, AOD-9604 remains popular in the peptide community for targeted fat loss — particularly when combined with exercise and other metabolic peptides.

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// How It Works

How AOD-9604 Works

AOD-9604 replicates HGH's lipolytic pathway without growth effects:

  1. Beta-3 adrenergic stimulation — Activates beta-3 receptors on adipocytes, triggering cAMP-mediated lipolysis (fat breakdown) — the same pathway activated by natural GH during fasting.
  2. Lipogenesis inhibition — Blocks de novo lipogenesis (new fat formation), preventing dietary calories from being stored as adipose tissue.
  3. No IGF-1 elevation — Unlike full HGH or GH secretagogues, AOD-9604 does not increase circulating IGF-1 levels, eliminating growth and potential cancer risk concerns.
  4. No insulin resistance — Does not affect glucose metabolism or insulin sensitivity, making it safer for metabolic health than full GH administration.
  5. Cartilage repair — Emerging research suggests AOD-9604 may stimulate proteoglycan synthesis in cartilage, leading to its exploration for osteoarthritis.
// Dosage Protocols

Dosage Information (User-Reported)

Disclaimer: Dosage information is compiled from user reports and published research. This is not medical advice. Consult a healthcare professional before use.
Level Dose Frequency Duration
Standard 300 mcg Once daily (fasting AM) 8-12 weeks
Enhanced 500 mcg Once daily (fasting AM) 8-12 weeks
Split Dose 250 mcg 2x daily (AM fasting + pre-bed) 8-12 weeks

What to Expect

Week 1-2

Minimal noticeable effects. Works subtly in the background. Some users report slight increase in body temperature or energy.

Week 3-4

Fat loss begins to become measurable. Stubborn fat areas may start responding. No appetite changes (unlike GLP-1 agonists).

Week 5-8

Visible fat reduction, particularly abdominal. Body composition improving. No water retention or bloating.

Week 8-12

Peak fat loss results. Best when combined with exercise and caloric awareness. Modest but consistent results.

Common Stacks

MOTS-c

Metabolic Amplification

AOD-9604 lipolysis + MOTS-c AMPK activation = dual-pathway fat loss

Ipamorelin

GH Enhancement

Combines targeted fat loss with natural GH elevation for comprehensive body composition

L-Carnitine

Fat Transport

Ensures mobilized fatty acids from AOD-9604 are transported to mitochondria for oxidation

// Preparation

Reconstitution & Storage

Reconstitute with bacteriostatic water. For a 5mg vial, add 2.5mL BAC water for 2mg/mL.

Inject water slowly. Do not shake. Swirl gently until clear.

Best administered on an empty stomach (fasting) for optimal fat-burning effect. Morning dosing preferred.

Storage: Lyophilized: -20°C to 2-8°C. Reconstituted: 2-8°C, use within 21 days.

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// Safety Profile

Side Effects & Safety

Potential Side Effects

  • ! Injection site redness or irritation
  • ! Mild headache
  • ! Fluid retention (mild, less than full GH)
  • ! Fatigue
  • ! Numbness or tingling at injection site
  • ! Generally very well tolerated with minimal side effects

Contraindications

  • ⚠ Pregnancy or breastfeeding
  • ⚠ Active malignancy
  • ⚠ Children (growth implications not studied)
  • ⚠ Known hypersensitivity to HGH-derived peptides

Legal & Regulatory Status

Not FDA-approved. TGA (Australia) approved as an ingredient in complementary medicines (topical). Available from peptide research vendors. Not a controlled substance.

// Research

Published Research

// Where to Buy

Top Vendors for AOD-9604

Ranked by our review scores. All vendors are independently tested.

B+
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// Related Compounds

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This content is for informational and educational purposes only. AOD-9604 is sold for research purposes. Never Natty does not condone or encourage the use of any substance in violation of any laws. Consult a healthcare professional before using any compound discussed on this site.