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Metabolic & GLP-1

AOD-9604

Also known as: hGH fragment 176-191, AOD9604

A modified C-terminal fragment of human growth hormone studied for its effects on fat metabolism — designed to promote lipolysis without the growth, blood-sugar, or IGF-1 effects of full growth hormone.

D
Written by
M.D., Staff Psychiatrist · Medical Reviewer, Strong Health
D
Medically reviewed by
M.D., Staff Psychiatrist · Medical Reviewer, Strong Health
Published: July 18, 2026 Updated: July 18, 2026 · Editorial Standards

What is AOD-9604?

AOD-9604 is a synthetic peptide derived from the last 16 amino acids of human growth hormone (hGH) — the region near the C-terminus, residues 176–191, with a small structural modification. This fragment corresponds to the part of the growth-hormone molecule that researchers identified as responsible for its fat-burning (lipolytic) activity.

The idea behind AOD-9604 is to isolate that fat-metabolism effect while leaving behind the parts of growth hormone that drive tissue growth, raise IGF-1, and affect blood sugar. It was originally developed as an anti-obesity candidate. It is not an FDA-approved drug; in the United States it is available only as a pharmacy-compounded preparation prescribed under physician supervision.

How AOD-9604 works

AOD-9604 is thought to act on fat (adipose) tissue much the way the C-terminal region of intact growth hormone does — stimulating lipolysis, the breakdown of stored triglycerides, and inhibiting lipogenesis, the formation of new fat. Animal work has linked this activity to β3-adrenergic receptor signaling in fat cells.

Critically, in preclinical models AOD-9604 produced these metabolic effects without binding the growth-hormone receptor in a way that raises IGF-1 or impairs glucose tolerance. That separation — fat metabolism without the growth and insulin-related actions of full hGH — is the central rationale for the molecule. Whether it translates into meaningful clinical fat loss in people is a separate question the human data have not clearly answered.

What AOD-9604 is used for

Abdominal & visceral fat

The most common reason patients ask about AOD-9604 — support for reducing stubborn abdominal fat as part of a broader metabolic and lifestyle plan.

Weight-management support

Considered as an adjunct within a structured weight-loss program built on nutrition, activity, and — where appropriate — other therapies, rather than as a standalone treatment.

Body-composition goals

Used by some patients aiming to shift body composition; we set expectations conservatively given the modest and mixed human evidence.

What the evidence shows

In laboratory and animal studies, AOD-9604 has repeatedly shown lipolytic activity — increasing fat breakdown and reducing fat accumulation — while, unlike full growth hormone, not raising IGF-1 or disturbing blood-glucose control in those models [1][2].

The human evidence is where candor matters most. AOD-9604 advanced into clinical trials as an oral anti-obesity candidate, and early-phase results were encouraging enough to justify a larger program. But the pivotal human weight-loss studies were disappointing: the effect on body weight was modest and, in the key trials, did not separate convincingly from placebo. The molecule was not brought to market as an obesity drug on the strength of those results [3].

So the honest summary is this: AOD-9604 has a clean mechanistic story and a reassuring safety record in humans, but it does not have robust clinical proof that it produces significant weight loss on its own. We share that plainly, because it should shape whether — and how — it fits your goals.

Dosing & administration context

AOD-9604 has been studied both orally and by subcutaneous injection; in clinical practice it is most often given as a daily subcutaneous injection, with the dose expressed in micrograms and courses measured in weeks to months.

The specific dose, route, frequency, and duration are individualized by the prescribing physician based on your goals, body composition, and response — which is why we frame this as clinical context, not a self-dosing guide. AOD-9604 obtained outside a licensed pharmacy (research-only vials, gray-market powders) carries no guarantee of identity, purity, or sterility.

AOD-9604 is not an FDA-approved medication. Content on this page is clinical context for physician-supervised, pharmacy-compounded use — not a dosing guide or a substitute for medical advice.

Safety & side effects

AOD-9604 has a favorable safety and tolerability profile in the human studies conducted to date, without the blood-sugar and growth-related concerns associated with full growth hormone. Reported side effects in clinical use are generally mild.

Because it is not an approved drug and long-term human data are limited, we screen carefully before prescribing and monitor throughout a course. As with every compounded peptide, source control is central — a product from a licensed 503A/503B pharmacy is a fundamentally different risk profile than a research vial of unknown origin.

Common side effects

  • ·Transient injection-site irritation, redness, or soreness
  • ·Occasional mild headache or nausea
  • ·No consistent effect on blood sugar reported in trials

Who should not use it

  • ·Pregnancy or breastfeeding
  • ·Active malignancy (discuss with your physician)
  • ·Known hypersensitivity to the compound

How Strong Health prescribes AOD-9604

At Strong Health, AOD-9604 is prescribed only after a physician evaluation of your goals, metabolic health, and history. It is dispensed exclusively through licensed 503A or 503B compounding pharmacies under physician orders; we do not sell or recommend research-only product.

Given the mixed human efficacy data, we are deliberate about where AOD-9604 fits. We treat it as a possible adjunct within a comprehensive weight and metabolic plan — never a standalone fix — and we are transparent that better-validated options, including GLP-1 therapies, exist for weight loss. Your physician sets the protocol, reviews your response at scheduled intervals, and adjusts or stops treatment based on results.

Get AOD-9604 under physician supervision →

Available in person at our Miami (Brickell) clinic and via telehealth across our service areas.

Frequently asked questions

Is AOD-9604 FDA-approved?

No. AOD-9604 is not an FDA-approved drug. It was studied as an anti-obesity candidate but was not brought to market as one. In the United States it is available only as a pharmacy-compounded preparation prescribed under physician supervision. Strong Health works exclusively with licensed 503A and 503B compounding pharmacies.

Does AOD-9604 actually cause weight loss?

The evidence is mixed. Animal studies show clear fat-burning activity, but the pivotal human weight-loss trials produced only modest results that did not convincingly beat placebo. We are candid about this: AOD-9604 is not proven to produce significant weight loss on its own, and we consider it only as one part of a broader plan.

How is AOD-9604 different from growth hormone?

AOD-9604 is a fragment of just the fat-metabolism region of human growth hormone. It is designed to promote lipolysis without the growth, IGF-1, and blood-sugar effects of full growth hormone. In preclinical models it separated those actions successfully, which is the main reason it was developed.

Does AOD-9604 affect blood sugar?

Unlike full growth hormone, AOD-9604 did not impair glucose control in the animal and human studies conducted to date. That cleaner metabolic profile is part of its appeal. Even so, we screen and monitor appropriately, especially in patients with existing metabolic conditions.

Is AOD-9604 better than GLP-1 medications for weight loss?

No. GLP-1 therapies such as semaglutide and tirzepatide have far stronger clinical evidence for weight loss than AOD-9604. We are transparent about that difference. AOD-9604 may be considered as an adjunct for specific goals, but it is not a replacement for better-validated options where those are appropriate.

References & sources

  1. [1] Heffernan MA, et al. The effects of human GH and its lipolytic fragment (AOD9604) on lipid metabolism following chronic treatment in obese mice and β3-AR knock-out mice. Endocrinology. 2001. View source →
  2. [2] Ng FM, et al. Metabolic studies of a synthetic lipolytic domain (AOD9604) of human growth hormone. Horm Res. 2000. View source →
  3. [3] Stier H, Vos E, Kenley D. Safety and tolerability of the hexadecapeptide AOD9604 in humans, and review of its clinical development. J Endocrinol Diabetes Obes. 2013.

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