Weight loss
A modified fragment of human growth hormone that targets fat cells for breakdown without affecting blood sugar or muscle growth—your metabolism's precision tool.
Start here
AOD-9604 is a lab-made fragment of human growth hormone, containing just the piece thought to drive fat breakdown. The goal is fat loss without growth hormone's side effects — studies report no impact on blood sugar or on growth signals like IGF-1 (a growth signal your liver releases in response to growth hormone). It has been through early human trials (Phase 1-2) but is not FDA approved.
AOD-9604 is like a tiny piece of growth hormone that only does one job: tell your fat cells to release their stored fat. Your body naturally uses growth hormone to burn fat, but full HGH comes with side effects like blood sugar problems and unwanted growth. Scientists figured out which part of growth hormone handles fat-burning and made AOD-9604 from just that piece. So you get the fat-burning signal without any of the other effects—your blood sugar stays normal, and you don't grow bigger hands or feet!
AOD-9604 is the tail end (amino acids 177-191) of human growth hormone, with a tyrosine swapped in at the start to make it more stable. Unlike full human growth hormone, it does not bind the growth hormone receptor and does not raise IGF-1 (a growth-related hormone). Its main action is to increase beta-3 adrenergic receptors (docking sites for adrenaline-type signals) on fat cells. This makes fat breakdown (lipolysis (fat breakdown)) stronger when stimulated by catecholamines (adrenaline-type hormones). It also blocks fat creation (lipogenesis) by suppressing fatty acid synthase (an enzyme that builds fat). The peptide has an extremely short half-life (how long it stays active in your body) in the blood (about 3 minutes), but its effects on receptor levels and enzyme activity last much longer. Research indicates it acts on pathways specific to fat cells without body-wide metabolic effects, which explains its excellent safety profile for blood sugar and insulin sensitivity (how well your body responds to insulin). A disulfide bridge (a chemical link) between Cys-7 and Cys-14 holds its shape, which it needs to work.
Evidence check
Some human studies
It has been tested in people, but only in small or early-stage studies. Promising, but not yet proven the way an approved medicine is.
Every numbered marker on this page links to one of the 5 sources at the bottom.
Fat Targeting
Targets fat cells by switching on beta-3 receptors (docking spots on fat cells) without affecting muscle, blood sugar, or other tissues. One of the most selective fat-targeting compounds available
Safety Profile
Extensive human clinical trial data showing excellent tolerability, with no effect on blood sugar handling, insulin levels, or IGF-1—safer than full HGH for metabolic support
Joint Support
Emerging research demonstrates cartilage regeneration properties, with animal studies showing enhanced joint repair especially when combined with hyaluronic acid
The most-asked question
The research-reported range is 300–400 mcg, once daily. Studies used different doses for different situations — find yours:
Fat loss research, Body recomposition
250 mcg
AOD9604 is a research peptide and not an approved medicine. Doses around 250 mcg under the skin are a common starting point in practice. In a human trial the most effective amount was about 1 mg per day. 15
Fat loss research, Body recomposition
300-400 mcg
A commonly used daily amount in practice. The largest human study found benefit up to about 1 mg/day with no extra gain from higher doses. 15
Fat loss research, Body recomposition
500 mcg
A higher amount sometimes used in practice. Going above roughly 1 mg/day did not improve results in the human trial. 15
The ceiling: 500 mcg once daily (or 250 mcg twice daily)
Reconstitution, in plain words
Peptides usually arrive as a freeze-dried powder in a small vial. “Reconstitution” just means adding sterile water back in so you can measure a dose. Here's how it works for AOD-9604:
5mg vial + 2mL BAC water = 2.5mg/mL (2500mcg/mL). For 250mcg dose, draw 0.1mL (10 units on insulin syringe).
At 2500mcg/mL concentration: 0.1mL = 250mcg, 0.15mL = 375mcg, 0.2mL = 500mcg
Three quick questions — your vial, your water, your dose — and it tells you the exact syringe mark. “Find dose amount” is preloaded with AOD-9604's recorded schedule.
Injection sites & technique
Injection into the fatty tissue just under the skin
Timing
Morning on an empty stomach, 30-60 minutes before food or exercise
Best taken on an empty stomach for optimal absorption. Wait at least 30 minutes before eating.
Can be combined with GHRP peptides like Ipamorelin at the same time. If using with CJC-1295, inject together for synergistic effects on fat metabolism.
The honest list
These show up most often. They usually fade as your body adjusts.
Redness, minor swelling, or tenderness at the injection site that typically resolves within hours
What to do Rotate injection sites, ensure proper technique, apply ice if needed
Occasional headache, especially in the first few days of use
What to do Stay well hydrated, usually resolves with continued use
Temporary flushing sensation after injection, lasting minutes
What to do This is normal and harmless—resolves quickly on its own
Worth knowing about, but most people never see these.
Some users report mild fatigue, particularly at higher doses
What to do Reduce dose if persistent, ensure adequate sleep and nutrition
Rare reports of lightheadedness
What to do Sit or lie down if feeling dizzy, reduce dose if it continues
Rare, but if any of these happen, stop and contact a medical professional.
Very rare—may include rash, swelling, or difficulty breathing
What to do Discontinue immediately and seek medical attention if allergic symptoms occur
Week by week
Is it right for you?
Always consult with a healthcare provider before stopping or if you experience any concerning symptoms. This information is for educational purposes and should not replace professional medical advice.
AOD-9604 does not affect blood sugar, but monitor if diabetic
No known interactions, but monitor blood sugar as always
Use caution—may slightly increase bruising at injection sites
No known interactions, safe to use together
Excellent synergy for fat loss—can be injected together
Commonly stacked for body recomposition—complementary mechanisms
Safe to combine; different mechanisms, no interaction concerns
Safe combination for those seeking fat loss plus recovery benefits
Generally not combined—AOD-9604 mimics part of HGH's action
May enhance fat oxidation effects—good synergy
Safe to combine for enhanced fat loss, but not necessary
Safe and may support overall metabolic health
Recommended to support muscle preservation during fat loss
AOD-9604 shines when you want to target stubborn fat deposits. It works by mimicking how growth hormone breaks down fat, but without the side effects of actual HGH. Think of it as a smart missile that targets fat cells specifically.
Perfect for those who want to lose fat while maintaining muscle. Unlike many fat loss compounds, AOD-9604 doesn't affect muscle tissue or mess with your blood sugar levels—it's laser-focused on fat metabolism.
Ideal for boosting your metabolism naturally. AOD-9604 increases fat oxidation (your body's ability to burn fat for fuel) without the jittery stimulant effects of caffeine or other thermogenics.
Emerging research shows AOD-9604 may help repair cartilage and support joint health. Studies in osteoarthritis models show it can reduce cartilage damage, making it a dual-purpose peptide for active individuals.
Unlike many weight loss compounds, AOD-9604 doesn't raise blood sugar, doesn't affect insulin, and doesn't stimulate cell growth. It's one of the gentlest approaches to enhancing fat metabolism available.
AOD-9604 has been studied in multiple human clinical trials involving thousands of participants. The safety profile is notably clean—it doesn't affect blood sugar, insulin levels, or cause the typical side effects of growth hormone. Phase 2 trials showed it was well-tolerated even at doses higher than typically used. The most common side effects are mild and injection-site related.
Metabolic Pharmaceuticals invested over $50 million in research, generating extensive human safety data. Multiple Phase 1-2 trials demonstrated excellent tolerability. The compound received GRAS (Generally Recognized as Safe) status for oral use in some jurisdictions. However, Phase 3 trials for obesity were not completed.
Keeping it good
Refrigerate at 36-46°F (2-8°C) for up to several months. Can also be stored frozen at -4°F (-20°C) for longer-term storage. Keep in original packaging away from light.
Refrigerate immediately at 36-46°F (2-8°C). Never freeze after mixing with bacteriostatic water. Store away from light. Discard after 28 days or if any degradation signs appear.
Not our opinion — the published record
2000
AOD-9604 reduced body weight gain by over 50% in obese rats without affecting insulin sensitivity—showing it targets fat metabolism safely without diabetic side effects.
Ng FM et al.
2001
Both growth hormone and AOD-9604 increased fat burning and reduced weight gain. But unlike human growth hormone, AOD-9604 did not cause high blood sugar or lower insulin. That makes it a safer option.
Heffernan MA et al.
2001
AOD-9604 works through beta-3 adrenergic receptors (docking sites for adrenaline-type signals) on fat cells. It increases the number of these fat-burning receptors, which explains how it targets fat loss.
Heffernan M et al.
2015
AOD-9604 injections helped cartilage regrow in arthritic joints. AOD-9604 combined with hyaluronic acid (a joint-cushioning gel) gave the best results for joint repair.
Kwon DR et al.
2007
In a 12-week randomized trial of ~300 obese adults, AOD9604 was tested at 1, 5, 10, 20 and 30 mg daily; the 1 mg dose produced the greatest weight loss versus placebo, with no added benefit from higher doses.
Metabolic Pharmaceuticals; Stier H, et al.
If this isn't the right fit
Your questions
AOD-9604 is just the fat-burning piece of HGH without the rest. Full HGH can raise blood sugar, cause water retention, joint pain, and even make your hands and feet grow. AOD-9604 only targets fat cells, so you get fat loss without those side effects. It also doesn't increase IGF-1 (a growth signal your liver releases in response to growth hormone) levels, making it a more targeted, safer option.
Most people start noticing subtle changes around weeks 3-4 and more significant results by weeks 6-8. Remember, AOD-9604 is a gentle compound—it enhances your body's natural fat burning rather than forcing dramatic changes. Combined with proper diet and exercise, expect gradual but steady fat loss.
Yes! AOD-9604 enhances fat metabolism, but it doesn't magically eliminate the need for a caloric deficit. Think of it as a tool that makes your fat loss diet more effective. You'll still need to eat less than you burn—AOD-9604 just helps your body access and burn stored fat more efficiently.
AOD-9604 has a very short half-life (just a few minutes in your blood), so you want maximum absorption when you inject it. Food, especially fat, can interfere with peptide absorption. Taking it fasted ensures the peptide gets into your system efficiently before your body starts dealing with digestion.
Absolutely! AOD-9604 stacks well with growth hormone releasing peptides like Ipamorelin and CJC-1295 for enhanced body recomposition. It can also be combined with healing peptides like BPC-157 or TB-500 if you have recovery goals. Just avoid combining it with actual HGH since they'd be redundant.
No, AOD-9604 is not FDA approved for any use in the United States. It underwent Phase 1 and Phase 2 clinical trials for obesity, which showed it was safe and well-tolerated, but Phase 3 trials were not completed. It's currently available as a research peptide or through compounding pharmacies in some regions.
No—this is one of AOD-9604's biggest advantages. Unlike full growth hormone, AOD-9604 does not affect blood sugar, insulin sensitivity (how well your body responds to insulin), or glucose metabolism. Multiple clinical studies confirmed this. It was specifically designed to provide fat loss benefits without the metabolic side effects of HGH.
Emerging research suggests yes! Studies in osteoarthritis models show AOD-9604 can help repair cartilage and reduce joint damage. When combined with hyaluronic acid, the effects were even better. While more research is needed, some people use AOD-9604 specifically for joint support in addition to fat loss.
5 sources
Every numbered marker on this page points to one of these. Same sources, same numbering as the AOD-9604 research profile on Peptide Initiative.
Want the deep science?
Every claim on this page traces back to the research database behind Peptide Initiative — studies, citations, clinical trial data, and the technical detail we deliberately left out here.
Open the research profileThis guide is education, not medical advice. AOD-9604 is a research compound that is not FDA-approved for human use. Talk to a clinician before taking anything.
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