AOD-9604.

Quick Overview.

AOD-9604 (Anti-Obesity Drug 9604) is a modified fragment of the Human Growth Hormone (HGH) molecule. Specifically, it is the last 15 amino acids of the HGH chain (residues 176-191) with an added Tyrosine amino acid at the beginning to stabilize it.[1]

Full HGH does many things in the body: it builds muscle, grows organs, raises blood sugar, and burns fat. Scientists isolated just the tiny piece of the HGH molecule responsible for fat burning and created AOD-9604. The result is a peptide that stimulates lipolysis (the breakdown of fat) and inhibits lipogenesis (the creation of new fat) without causing the dangerous side effects of full HGH, such as insulin resistance or organ growth.[2]

• Primary Use Case: Targeted fat loss (especially visceral fat) and potential joint/cartilage repair.
• Mechanism: Upregulates beta-3 adrenergic receptors on white adipose tissue to stimulate fat breakdown, independent of the HGH receptor.[3]
• Who it is for: Individuals looking to accelerate fat loss during a caloric deficit without the appetite suppression or nausea of GLP-1 agonists.
• Who it is NOT for: Those looking for a "magic pill" who are not willing to do fasted cardio. AOD-9604 only unlocks the fat; you still have to burn it.

The Protocol & Usage Guide.

confidence_tier: well-established

AOD-9604 is highly sensitive to insulin. If insulin is present in your blood (from eating carbohydrates), the fat-burning mechanism of AOD-9604 is completely shut down. Therefore, it MUST be taken in a fasted state.

Standard Dosing

The "Mobilize and Burn" Strategy

1. Inject AOD-9604 immediately upon waking.
2. Wait 15-30 minutes.
3. Perform 30-45 minutes of Zone 2 (steady-state) cardio.
4. Do not eat carbohydrates for at least an hour after the cardio session.

This is the only way to guarantee the mobilized fat is burned and not re-stored.

Reconstitution Math

• Vial Size: 2 mg (2,000 mcg)
• Bacteriostatic Water Added: 2 mL
• Concentration: 1,000 mcg per mL
• To draw 300 mcg: Pull to the 30-unit mark (0.3 mL) on a U-100 insulin syringe.

Nutritional Support & Recommended Supplements.

confidence_tier: emerging

Safety, Interactions & Side Effect Management.

confidence_tier: well-established

In six human clinical trials involving over 900 participants, AOD-9604 was shown to have an excellent safety profile, with no effects on IGF-1 levels, blood sugar, or insulin resistance (unlike full HGH).[4]

Side Effect Profile

Contraindications

• Absolute: Pregnant or breastfeeding women.
• Relative: None explicitly known.

Drug Interactions

• Insulin / Carbohydrates: The lipolytic cascade triggered by AOD-9604 is highly sensitive to insulin. Even a small spike in insulin will completely halt the release of free fatty acids.[3]

Common Stacks & Combinations.

confidence_tier: community

Body Composition & Training Guide.

confidence_tier: community

• Fat Loss vs. Weight Loss: AOD-9604 does not cause rapid water weight loss or suppress your appetite like Ozempic. It simply unlocks fat cells. If you aren't in a caloric deficit and doing cardio, that unlocked fat just goes right back into the cell.
• Muscle Building: It does not increase IGF-1 levels, which is the mechanism by which HGH builds muscle. AOD-9604 is strictly for fat loss and potentially joint repair.[8]

Storage, Handling & Accessibility.

confidence_tier: well-established

• Unreconstituted (Lyophilized Powder): Store in the freezer (-20°C) for up to 24 months.
• Reconstituted (Liquid): Must be stored in the refrigerator (2-8°C). Good for 30 days.
• WADA Status: PROHIBITED. WADA explicitly bans AOD-9604 under the category of Peptide Hormones and Mimetics. It was at the center of a massive doping scandal in the Australian Football League (AFL) in 2013.[5]

Bloodwork Monitoring Guide.

confidence_tier: emerging

AOD-9604 does not typically alter standard blood markers. Unlike full HGH, it does not raise IGF-1 levels or cause insulin resistance.[4]

Comparison to Similar Compounds.

confidence_tier: well-established

Deep Dive (For Advanced Researchers).

confidence_tier: well-established

Mechanism of Action

AOD-9604 is a 16-amino acid peptide. It is identical to the C-terminal sequence of human growth hormone (residues 176-191), with the addition of a tyrosine residue at the N-terminus (Tyr-hGH176-191).[1]

1. Beta-3 Adrenergic Receptors: Research indicates that AOD-9604 exerts its fat-burning effects by upregulating the beta-3 adrenergic receptors on white adipose tissue.[3]
2. Inhibition of Lipogenesis: Simultaneously, AOD-9604 downregulates the enzymes involved in lipogenesis (the creation of new fat), specifically acetyl-CoA carboxylase.[2]
3. No IGF-1 Activation: Because it lacks the binding domain of the full HGH molecule, AOD-9604 cannot bind to the HGH receptor in the liver. Therefore, it does not stimulate the production of IGF-1 (Insulin-like Growth Factor 1), meaning it causes no cell proliferation, no organ growth, and no insulin resistance.[4]

Clinical Trial Summary

• Obesity Trials: Metabolic Pharmaceuticals ran six human clinical trials (Phase 1 and 2) involving over 900 patients. In a 12-week Phase 2b trial, patients on 1mg/day of AOD-9604 lost an average of 2.6 kg, compared to 0.8 kg in the placebo group. While statistically significant, the weight loss was considered too modest by pharmaceutical standards, and the company eventually halted development for obesity.[6]
• Osteoarthritis: Interestingly, AOD-9604 is currently being investigated for the treatment of osteoarthritis. Animal models have shown that intra-articular injections of AOD-9604 promote cartilage repair and reduce joint inflammation, likely through pathways independent of its lipolytic effects.[7]

Frequently Asked Questions (FAQ).

confidence_tier: community

Q: Is AOD-9604 the same as Frag 176-191? A: Almost. Frag 176-191 is just the raw cut of the HGH molecule. AOD-9604 is Frag 176-191 with an added Tyrosine amino acid to make it more stable. AOD-9604 is generally considered superior and more reliable.

Q: I've been taking it for a week and haven't lost any weight. Is it fake? A: Probably not. AOD-9604 does not cause rapid water weight loss or suppress your appetite like Ozempic. It simply unlocks fat cells. If you aren't in a caloric deficit and doing cardio, that unlocked fat just goes right back into the cell.

Q: Can I take it before bed? A: Yes, as long as you haven't eaten carbohydrates for 2-3 hours prior. Taking it before bed mimics the body's natural nocturnal release of growth hormone and allows for fat mobilization while you sleep.

International Regulatory Status.

confidence_tier: well-established

Decision Tree.

confidence_tier: community

[Goal: Fat Loss?]
  |
  +-- Are you willing to do fasted cardio every morning?
        |
        +-- (No) -> STOP: AOD-9604 will likely do nothing for you. Consider GLP-1s.
        |
        +-- (Yes) -> Are you a WADA-tested athlete?
              |
              +-- (Yes) -> STOP: AOD-9604 is explicitly banned.
              |
              +-- (No) -> Use AOD-9604 (300mcg fasted upon waking, followed by cardio).

Schema.org Data.

{
  "@context": "https://schema.org",
  "@type": "MedicalEntity",
  "name": "AOD-9604",
  "alternateName": ["Anti-Obesity Drug 9604", "Tyr-hGH176-191"],
  "description": "A modified fragment of human growth hormone that stimulates lipolysis and inhibits lipogenesis without affecting IGF-1 levels or insulin sensitivity.",
  "legalStatus": {
    "@type": "DrugLegalStatus",
    "description": "Unapproved by FDA; available as a research chemical. Explicitly prohibited by WADA.^[5]"
  }
}

What we cited.