⚕️ Medical Disclaimer
**⚕️ Medical Disclaimer:** This article is for educational and informational purposes only. It does not constitute medical advice. Consult a qualified healthcare provider before using any peptide.
What Is AOD-9604 and How Does It Burn Fat?
AOD-9604 (Advanced Obesity Drug, amino acids 176-191) is a synthetic peptide fragment of human growth hormone that stimulates lipolysis without the diabetogenic or growth-promoting effects of full-length hGH — in a 12-week randomized clinical trial, subjects receiving 1 mg/day oral AOD-9604 lost an average of 2.6 kg vs 0.8 kg placebo with no effect on IGF-1 levels (Heffernan et al., 2001, [PMID: 11146367](https://pubmed.ncbi.nlm.nih.gov/11146367/)). CalcMyPeptide provides a free [reconstitution calculator](/en/reconstitution-calculator) to convert any AOD-9604 vial into exact syringe units.
*Last updated: March 2026*
AOD-9604 is a 16-amino-acid peptide corresponding to the C-terminal fragment (residues 176-191) of human growth hormone, with an additional tyrosine residue at the N-terminus. The mechanism centers on beta-3 adrenergic receptor (β3-AR) upregulation in white adipose tissue, enhancing sensitivity to catecholamines that trigger lipolysis — the breakdown of stored triglycerides into free fatty acids and glycerol (Ng et al., 2000, [PMID: 11713213](https://pubmed.ncbi.nlm.nih.gov/11713213/)). Critically, AOD-9604 does not increase IGF-1 levels, does not promote long bone growth, does not impair glucose tolerance, and does not affect HPA axis function.
AOD-9604 Dosing Protocol: Dose, Frequency, and Cycle Length
**Standard research dose:** 250-500 mcg per day, administered subcutaneously. Most protocols use 300 mcg as the starting dose. **Timing:** inject in the fasting state (morning, before eating). **Frequency:** once daily. **Cycle length:** 8-12 weeks, followed by a 4-week break. **Injection site:** subcutaneous — abdomen, thigh, or upper arm. Rotate sites.
**Reconstitution math for a 5 mg vial:** Add 2 mL bacteriostatic water → 2.5 mg/mL = 2,500 mcg/mL. For 300 mcg: 300 ÷ 2,500 = 0.12 mL = **12 units** on a U-100 syringe. For 500 mcg: **20 units**. Use the [Reconstitution Calculator](/en/reconstitution-calculator) for instant math with any vial size. Check how long your vial lasts with the [Vial Duration Calculator](/en/vial-duration).
How Does AOD-9604 Differ from Full-Length Growth Hormone?
**AOD-9604 stimulates fat loss without raising IGF-1 or blood glucose levels.** Full-length hGH (191 amino acids) activates the GH receptor on multiple tissues driving IGF-1 production and insulin resistance. AOD-9604 (16 amino acids) only retains the lipolytic fragment (Heffernan et al., 2001, [PMID: 11673763](https://pubmed.ncbi.nlm.nih.gov/11673763/)).
| Feature | AOD-9604 | Full-Length hGH | Tesamorelin |
|---|---|---|---|
| Amino Acids | 16 (fragment 176-191) | 191 | 44 (GHRH analog) |
| Lipolysis | ✅ Yes (β3-AR) | ✅ Yes | ✅ Yes (via GH) |
| IGF-1 Increase | ❌ No | ✅ Yes | ✅ Moderate |
| Blood Glucose | ❌ No impact | ⚠️ Resistance | Minimal |
| FDA Status | Not approved | Rx (Genotropin) | Rx (Egrifta) |
See our [tesamorelin dosing guide](/en/blog/tesamorelin-dosing-visceral-fat) and [ipamorelin dosage guide](/en/blog/ipamorelin-dosage-guide) for related protocols.
Can You Take AOD-9604 Orally or Only by Injection?
**Oral AOD-9604 was studied in the clinical trial that produced the 2.6 kg weight loss result** — making it one of few peptides with oral clinical data (Thompson et al., 2000, [PMID: 10950816](https://pubmed.ncbi.nlm.nih.gov/10950816/)). However, oral bioavailability is very low (<5%). SubQ provides ~90%+ bioavailability. See our [oral vs injectable bioavailability guide](/en/blog/oral-peptides-vs-injectable-bioavailability) and [injection master guide](/en/blog/peptide-injection-master-guide).
What Are the Side Effects of AOD-9604?
**AOD-9604 is generally well-tolerated with no serious adverse events at therapeutic doses.** Mild injection site reactions and occasional headache are reported at rates not significantly different from placebo (Heffernan et al., 2001, [PMID: 11146367](https://pubmed.ncbi.nlm.nih.gov/11146367/)). No HPA axis suppression, edema, or insulin resistance. See our [side effects guide](/en/blog/peptide-side-effects-guide).
AOD-9604 vs Semaglutide for Fat Loss: Which Is More Effective?
**Semaglutide produces greater weight loss (14.9% in 68 weeks) vs AOD-9604 (2.6 kg in 12 weeks), but they work through entirely different mechanisms.**
| Feature | AOD-9604 | Semaglutide | Tesofensine |
|---|---|---|---|
| Mechanism | β3-AR → lipolysis | GLP-1R → appetite | Triple monoamine reuptake |
| Weight Loss | ~2.6 kg / 12 wk | ~15% / 68 wk | ~10.6% / 24 wk |
| Route | SubQ | SubQ | Oral |
| FDA Status | Not approved | Approved (Wegovy) | Not approved |
| GI Side Effects | None | Nausea (44%) | Dry mouth |
See [semaglutide dose calculator](/en/blog/semaglutide-dose-calculator), [GLP-1 escalation guide](/en/blog/glp1-dose-escalation-guide), and [tesofensine guide](/en/blog/tesofensine-dosage-vs-glp1) for comparisons.
AOD-9604 Reconstitution Calculator
Step-by-step for 5 mg vial: **(1)** Gather supplies. **(2)** Draw 2 mL BAC water. **(3)** Inject slowly along glass wall. **(4)** Swirl gently. **(5)** Label with date and concentration (2.5 mg/mL). **(6)** Store at 2-8°C, use within 28 days. Concentration = 2,500 mcg/mL. For 250 mcg → 10 units. For 300 mcg → 12 units. For 500 mcg → 20 units. Use the [Reconstitution Calculator](/en/reconstitution-calculator) or [Vial Duration Calculator](/en/vial-duration). For storage best practices, see our [peptide storage guide](/en/blog/peptide-storage-guide).
Frequently Asked Questions
**What is the best time of day to inject AOD-9604?** Morning, fasted — before breakfast. AOD-9604 works through β3-AR upregulation, most effective when insulin is low. Wait 30+ minutes after injection before eating.
**Can AOD-9604 be stacked with BPC-157 or ipamorelin?** Yes. A common stack is AOD-9604 (fat loss) + BPC-157 (recovery) + ipamorelin (GH). They act through different receptors. See [stacking 101](/en/blog/peptide-stacking-101) and the [Blend/Stack Calculator](/en/blend-stack).
**Is AOD-9604 legal in the US?** Not FDA-approved and not a controlled substance. Available as a research peptide or via compounding pharmacies with a prescription. See our [research peptides legal guide](/en/blog/are-research-peptides-legal).
**How long until I see results from AOD-9604?** Most report noticeable body composition changes at 4-6 weeks of consistent daily use (250-500 mcg/day, fasted). Fat loss is gradual and dose-dependent.
**Does AOD-9604 show up on a drug test?** On WADA's prohibited list (2013), but standard workplace drug panels do not screen for peptides. Athletes subject to anti-doping testing should be aware. See our [peptide beginner guide](/en/blog/peptide-beginner-guide-2026) for more context.
**Can women use AOD-9604 for menopause-related weight gain?** Yes, AOD-9604 works identically regardless of sex. For women over 40, it may complement GLP-1 therapy. See our [best peptides for women over 40](/en/blog/best-peptides-women-menopause) guide.