PepRank

AOD-9604

53%positive26 reports

Also: hGH fragment 177-191 (Tyr-modified) · Advanced Obesity Drug

CautionRecoveryOral / Injection

GH C-terminal fragment that failed obesity trials; safe-looking but doesn't work.

YLRIVQCRSVEGSCGF · hGH 177-191 with added N-terminal Tyr; Cys7-Cys14 disulfide (16 residues)

YLRIVQCRSVEGSCGF hGH 177-191 with added N-terminal Tyr; Cys7-Cys14 disulfide

#13 of 61 research peptides · updated
Access
Grey market
Cost / month
≈ €45–90
at 250–500 mcg/day · XL Peptides · €5.98/mg · no trust-4 shop lists it
InjectionFelt in 2–4 weeks

Builds over days or weeks of regular use rather than with each dose.

26 user reports
Positive 14Mixed 1Nothing 9Negative 2
  • r/Peptidesource· · 28 upvotesOriginal ↗

    i was on a bit of a stall with Tirzepatide and added this in...first in the morning...for 3 weeks, nothing. I changed it up 2 weeks ago to the evening. losing 1.5lbs/week!

    Positive300 mcg, 2 hours after the evening meal · Injection · 5 weeks

    added during a tirzepatide stall

  • r/Retatrutide· · 21 upvotesOriginal ↗

    In the 8 weeks since starting AOD, I have lost 12" total from chest/waist/navel/upper and lower hip/thigh. In the 8 weeks prior to AOD, I only lost 6" total from those same points.

    Positive250 mcg twice daily · Injection · 8 weeks

    on tirzepatide 15 mg throughout, 10 lb from goal; tracked tape measurements weekly

  • r/Peptidesource· · 13 upvotesOriginal ↗

    I'm honestly not sure if the AOD is working or if I will need to do it for longer amount of time.

    Negative0.04 ml daily, fasted · Injection · 1 month

    lean woman also running CJC-1295, a GHK/BPC/TB blend and NAD, so the GI effect is not pinned on AOD

Users report
About half of the reports claim fat loss or a broken stall, but almost every success story is confounded by tirzepatide/retatrutide plus a diet. Experienced users repeat that it lost to placebo and was scrapped in 2007 (those trials used oral doses; users inject). The most common practical complaint is vials going cloudy or gelling. Roughly 35-40% notice nothing, and a few say they stalled or regained weight while on it.
Best effects
Fat loss (not supported by RCTs) · joint/cartilage claims (animal only)
Downsides
No measurable effect for most · cloudy/gelling reconstitution · injection sting
Watch
Generic: grey-market purity; FDA noted serious adverse events of unclear causality and immunogenicity concerns for compounded forms
Evidence
Human RCTs — Six double-blind trials, ~900 people: no IGF-1 or glucose effect, placebo-like tolerability, efficacy failed
Typical use
250-500 mcg/day subQ, fasted, before cardio. In practice not worth it.
Getting it
Research-peptide vendors and a few compounders; vials often go cloudy or gel in plain bacteriostatic water.
Stacked with
Tirzepatide or retatrutide: almost every success story; users add AOD to break a GLP-1 stall. · fasted cardio: injected on waking or at night, fasted, on the theory that released fat must be burned. · tesamorelin or CJC-1295/ipamorelin: common GH-axis add-ons that further confound any AOD effect.

User reports 27

  • r/Peptidesource· · 28 upvotesOriginal ↗

    i was on a bit of a stall with Tirzepatide and added this in...first in the morning...for 3 weeks, nothing. I changed it up 2 weeks ago to the evening. losing 1.5lbs/week!

    Positive300 mcg, 2 hours after the evening meal · Injection · 5 weeks

    added during a tirzepatide stall

  • r/Retatrutide· · 21 upvotesOriginal ↗

    In the 8 weeks since starting AOD, I have lost 12" total from chest/waist/navel/upper and lower hip/thigh. In the 8 weeks prior to AOD, I only lost 6" total from those same points.

    Positive250 mcg twice daily · Injection · 8 weeks

    on tirzepatide 15 mg throughout, 10 lb from goal; tracked tape measurements weekly

  • r/Retatrutide· · 15 upvotesOriginal ↗

    Added AOD about 3 months ago, broke a stall, & the belly roll melted away.

    PositiveInjection · 3 months

    added to tirzepatide; 80 lb total loss mostly credited to tirzepatide

  • r/Peptidesource· · 12 upvotesOriginal ↗

    I've been taking AOD for 6 months. For me it's been fantastic I'm down 11 lb. I also substantially changed my eating habits.

    PositiveInjection · 6 months

    also changed diet substantially

  • r/Peptidesource· · 11 upvotesOriginal ↗

    In maintenance mode and taking AOD, my muffin top is shrinking. Maintaining my weight, but the muffin is shrinking.

    PositiveInjection · 3 cycles

    on GLP-1 maintenance after 1.5 years of weight loss

  • r/Retatrutide· · 10 upvotesOriginal ↗

    Agreed that AOD just isn't comparable to GLP meds, but in my experience, it does give a noticeable boost to weight/fat loss in obese subjects. It has broken my subjects stall every time they restarted it.

    Positive300 mcg fasted each morning · Injection

    obese, on a GLP-1 drug; notes a wave of underdosed or gelling vials

  • r/Retatrutide· · 9 upvotesOriginal ↗

    I lost 4" around my waist in just two months, and I was not obese.

    PositiveInjection · 2 months

    stacked with tirzepatide; not obese

  • r/Peptidesource· · 5 upvotesOriginal ↗

    Second cycle of AOD and it helped drop 5lbs in one week after a month stall. But the inches are even more noticeable.

    Positivemiddle of the night, fasted 4-6 h either side · Injection · second cycle

  • r/Retatrutide· · 3 upvotesOriginal ↗

    I really like AOD. I use it M-F first thing in the morning. It's really good for people with very little visceral fat. It's not a jackhammer. More of a chisel.

    PositiveMonday-Friday on waking · Injection

    posts in a retatrutide subreddit

  • r/Retatrutide· · 2 upvotesOriginal ↗

    AOD used during a fasted training session does indeed help to burn the midsection. Been using it about 3 weeks and it's done great for me. Been on Reta for 10 weeks

    Positivebefore fasted training · Injection · 3 weeks

    10 weeks into retatrutide with large weight loss

  • r/Peptidesource· · 2 upvotesOriginal ↗

    I actually love AOD. It works for some (me being one of those) but does nothing for others.

    PositiveInjection

  • r/Peptidesource· · 2 upvotesOriginal ↗

    I use it with hGH to get the lipolysis advantages without taking too high of a hGH dose… to avoid water attention/wrist pain) and it's great but I really needed like 4+ months/I thought it wasn't working

    PositiveInjection · 4+ months

    used with low-dose HGH, so not isolated

  • r/Retatrutide· · 2 upvotesOriginal ↗

    Started AOD June 12th starting weight 196.8 on June 12th currently 179.0 today, F/40yr.

    PositiveInjection · 11 weeks

    stacked with semaglutide and retatrutide; 3.5 months postpartum

  • r/Peptidesource· · 2 upvotesOriginal ↗

    I personally felt for me like it helped get rid of some fat on my stomach.

    PositiveInjection

    49-year-old woman microdosing tirzepatide at goal weight

  • r/Retatrutide· · 3 upvotesOriginal ↗

    Used with reta in Nov ... nothing , put it in the back of the freezer. Figured id use up remaining viles a little over 2 weeks ago ... like rocket fuel .

    MixedInjection

    on retatrutide both times

  • r/Peptidesource· · 11 upvotesOriginal ↗

    My wife and I both tried AOD for 9 weeks. Neither of us noticed any change.

    NothingInjection · 9 weeks

    both the commenter and their wife

  • r/Peptidesource· · 8 upvotesOriginal ↗

    I lost a lot more and quicker on 10MG tirz - no AOD.

    NothingInjection

    lost more on a higher tirzepatide dose without AOD

  • r/Retatrutide· · 7 upvotesOriginal ↗

    I've noticed nothing with AOD.

    NothingInjection

  • r/Peptidesource· · 5 upvotesOriginal ↗

    I didn't notice anything when I tried AOD. Mots did nothing for me either.

    NothingInjection

  • r/Retatrutide· · 4 upvotesOriginal ↗

    I used AOD for 12 weeks with Tirz. Can't say it did anything I could quantify.

    NothingInjection · 12 weeks

    with tirzepatide

  • r/Peptidesource· · 2 upvotesOriginal ↗

    I have been on it for 3 weeks - I don't notice any changes.

    NothingInjection · 3 weeks

  • r/Peptidesource· · 2 upvotesOriginal ↗

    For the first month, it seemed to boost my weight loss by 0.2 lbs/week. This was in addition to what I was already losing on tirz. But after that, I didn't notice it making any difference.

    NothingInjection · 3 months, then 1 more month after a break

    on tirzepatide

  • r/Peptidesource· · 1 upvotesOriginal ↗

    Nothing for me. Is a 50-50

    NothingInjection

  • r/Peptidesource· · 1 upvotesOriginal ↗

    I have used AOD and it really did nothing for me. I have heard the same from many others as well.

    NothingInjection

  • r/Peptidesource· · 13 upvotesOriginal ↗

    I'm honestly not sure if the AOD is working or if I will need to do it for longer amount of time.

    Negative0.04 ml daily, fasted · Injection · 1 month

    lean woman also running CJC-1295, a GHK/BPC/TB blend and NAD, so the GI effect is not pinned on AOD

  • r/Peptidesource· · 1 upvotesOriginal ↗

    Then I added AOD 9604. I gained back 5 pounds and was stuck there for 2 weeks. I quit the AOD 9604 and immediately lost those 5 pounds and 2 more in less than a week.

    NegativeInjection · 2 weeks

    on tirzepatide and cagrilintide; weight fell again once AOD was stopped

  • r/RetaForBodybuilding· · 13 upvotesOriginal ↗

    I want to discuss whether or not these peptides are actually worth the money. Right off the bat, I'm going to tell you that the price of growth hormone from the distributor I've set you guys up with is actually a better price than both of these peptides and works better.

    NothingInjection · vendor-adjacent

    post steers readers to HGH from a distributor the author has "set you guys up with"

Safety

Tier by safety barStrict CautionBalanced CautionEvidence only Caution

Seen harmMechanismData gapSilent harmProduct

Seen harm 1/3
Six RCTs (n=893) found side effects matching placebo and no related SAEs, but FDA states it identified serious adverse events that may be associated, causality unclear. Stier et al. 2013: safety of AOD9604 across six RCTs, n=893 (J Endocrinol Metab) ↗FDA: bulk drug substances that may present significant safety risks (category 2 and withdrawn nominations) ↗
Mechanism 0/3
A fragment of growth hormone (176-191) that in trials did not change IGF-1 or glucose; no pathway to serious harm is known. Stier et al. 2013: safety of AOD9604 across six RCTs, n=893 (J Endocrinol Metab) ↗
Data gap 1/3
Six RCTs with 893 people, oral up to 24 weeks, but nobody has trialled the subcutaneous injection people use. Stier et al. 2013: safety of AOD9604 across six RCTs, n=893 (J Endocrinol Metab) ↗
Silent harm 1/3
Reported effects (GI upset, injection sting) are noticed at once.
Product 3/3
Injected from grey-market or compounded vials; FDA flagged immunogenicity for compounded forms, and it is on WADA's prohibited list. FDA: bulk drug substances that may present significant safety risks (category 2 and withdrawn nominations) ↗Mendias & Awan 2026 preprint: 6,441 grey-market peptide samples, 42-71% failed quality criteria, 15% had endotoxin ↗
Never if
Pregnancy or breastfeeding (no human reproductive data)

Where to buy 8 in Europe · 10 total

ShopFormPricePer mgTesting
XL PeptidesUK · GBpowder · 5 mg€3024.99 GBP€5.98/mgThird-party tested
Semax PolskaEU · PLpowder · 5 mg€31€6.14/mgThird-party testedout of stock
Europa-PeptideEU · PLpowder · 5 mg€35€7.00/mgOwn COA
Condor ResearchEU · SKcapsules · 18 mg€130€7.22/mgNo public tests
Baltic PeptidesEU · LTpowder · 5 mg€45€9.00/mgThird-party tested
Limitless Biotech (Limitless Life Nootropics)USpowder · 5 mg€4752.79 USD€9.49/mgNo public tests
Particle PeptidesEU · SKpowder · 5 mg€54€11/mgOwn COA
Prime PeptidesUSpowder · 5 mg€5460 USD€11/mgThird-party tested
Modern Peptides EUEU · DEpowder · 5 mgcontents not stated€55€11/mgOwn COA
Condor ResearchEU · SKpowder · 5 mg€65€13/mgNo public tests

Studies 3

Sources 2

More in Metabolic & weight all 10 →

  1. 1Lactotripeptides (VPP and IPP) VPP (3 residues) CautionSupplement Oral≈ €15–35 / month49%positive4 reportsFermented-milk ACE-inhibitor tripeptides; lower blood pressure by a few mmHg, best data in Japan.
  2. 25-Amino-1MQ Caution Oral / Injection≈ €72–1440 / month41%positive28 reportsSmall-molecule NNMT inhibitor sold alongside peptides for fat loss and energy; no human data.Novel systemic enzyme inhibitor with zero human safety data; unknown long-term metabolic and methylation effects.
  3. 3HGH Fragment 176-191 Caution Injection / Nasal≈ €27–72 / month40%positive14 reportsGrowth-hormone tail fragment sold for fat loss; AOD-9604's near-twin, untested in humans and rarely felt.
  4. 4Survodutide Excluded Injection≈ €36–140 / month56%positive24 reportsBoehringer's GLP-1/glucagon dual agonist: 12-13% weight loss and large liver-fat cuts in phase 3; unapproved.Unapproved drug bought as grey-market vials, usually stacked on tirzepatide: the GLP-1 class's pancreatitis, gallbladder and dehydration-kidney routes, a glucagon-driven heart-rate rise whose cardiovascular safety trial is still running, and GI effects harsh enough that about one in five phase 3 participants stopped.
  5. 5Mazdutide Excluded Injection≈ €36–140 / month55%positive21 reportsGLP-1/glucagon dual agonist approved in China in 2025 (Xinermei); grey-market 'ghetto reta' with tirzepatide.Carries the GLP-1 class's serious-harm routes on its own label (pancreatitis, gallbladder disease, acute kidney injury, boxed warning for thyroid C-cell tumours in rodents) plus a glucagon-driven heart-rate rise; outside China it is bought as unregulated research vials and mostly stacked on tirzepatide, a combination no trial has tested.
  6. 6GLP-1 agonists (semaglutide, tirzepatide, retatrutide) HAEGTFTSDVSSYLEGQAAKEFIAWLVKGRG (31 residues) Excluded Injection≈ €27–1210 / month49%positive55 reportsMost effective weight-loss drugs ever; powerful systemic drugs, not 'clean' wellness peptides.Potent drugs with real serious-harm paths (pancreatitis, gallbladder, GI, heart rate, NAION). Worth it for obesity/diabetes under a doctor, but outside a 'clean general-health peptide' list.
  7. 7MOTS-c MRWQEMGYIFYPRKLR (16 residues) Excluded Injection≈ €22–88 / month42%positive52 reportsMitochondrial AMPK-activating peptide; vivid endurance anecdotes, allergic sensitisation reports.Borderline: recurring reports of allergic sensitisation and anaphylaxis-like events, plus no human data on the native peptide at the doses used.
  8. 8Tesamorelin YADAIFTNSYRKVLGQLSARKLLQDIMSRQQGESNQERGARARL (44 residues) Excluded Injection≈ €240–480 / month43%positive29 reportsFDA-approved GHRH analogue for visceral fat; raises IGF-1, anaphylaxis reports.GH/IGF-1 axis elevation (neoplasm and glucose warnings on label) plus anaphylaxis reports.
  9. 9Cagrilintide Excluded Injection≈ €27–110 / month36%positive25 reportsNovo's weekly amylin analogue, the 'cagri' in CagriSema; a hard appetite brake, often with heavy fatigue.Unapproved drug bought as grey-market vials and usually stacked on retatrutide or tirzepatide outside any trial: gallbladder disease and fast lean-mass loss, severe hypoglycaemia if combined with insulin (amylin class), days of not eating from dosing errors with home-reconstituted vials, and a pH-sensitive peptide sold in plain powder.

Sequence beads

Each bead is one amino acid in the peptide's chain, coloured by its side chain: grey for non-polar, cyan for polar, blue for positively charged and fuchsia for negatively charged. Length and mix tell related peptides apart at a glance, from a two-residue dipeptide like carnosine to a 43-residue protein like thymosin beta-4. The colours describe chemistry only and predict neither effect nor safety.

non-polarpolarpositivenegative

Report grades

Every first-hand Reddit or X report is graded on its own, from glowing through positive, mixed, nothing and negative to bad reaction, and the bar shows how those grades split. Posts that look vendor-adjacent stay on the peptide's page but are left out of the counts.

GlowingPositiveMixedNothingNegativeBad reaction

% positive

The share of a peptide's graded Reddit and X reports that are glowing or positive, vendor-adjacent posts left out. A peptide with few reports is pulled toward the average of all reports, as if it had eight average ones besides its own, so two glowing posts cannot top the list. Kept peptides rank by the same reports' mean grade, shrunk the same way, and excluded ones follow in that order.

Researcher estimate

No first-hand report of this peptide has been graded yet, so the figure is the researchers' own rating out of 10 from what they read about it. It ranks alongside the computed scores until reports arrive.

Safety tier

Each peptide is tiered clean, caution or excluded from its five risk axes under the chosen safety bar. An excluded peptide has a plausible route to serious harm, so it stays listed with the reason but ranks behind every other entry, however good its reviews.

Safety bar

The safety bar sets how much risk it takes to exclude a peptide. Strict: out on any serious mechanism with little human data, or any documented serious harm. Balanced: out on documented serious harm (unless it is obvious, reversible and from a regulated product), or a serious mechanism whose harm would be silent with no human data at all. Evidence only: out only on documented serious harm in humans that is lasting, delayed or from grey-market product.

Seen harm

Documented serious adverse events in humans, from 0 for none despite real exposure to 3 for deaths or several well-documented serious harms. Serious means a hospital or emergency visit or harm lasting weeks, so a headache or a bad night does not count.

Mechanism

A plausible biological route to serious harm at the doses people use, such as growth-factor signalling, hormone-axis suppression, heart or blood-pressure effects or immune activation. It runs from 0 when none is known to 3 when a dangerous pathway has been shown in living animals.

Data gap

How little human safety data exists for the molecule actually sold, from 0 for an approved drug with large trials and years of use to 3 for no human safety data at all. A modified analogue does not inherit its parent's trials.

Silent harm

Whether the feared harm would show quickly or stay hidden, from 0 when it is obvious and goes on stopping to 3 when it is silent and delayed, like tumour promotion or slow organ damage. User reports cannot reveal a harm that takes years to appear, so a high score here limits what good reviews can tell you.

Product

The risk of what people actually buy, from 0 for a regulated pharmacy or supplement product taken by mouth or on the skin to 3 for a grey-market injectable. In one dataset of 6,441 grey-market samples, 42–71% failed basic quality criteria and 15% carried endotoxin.

Evidence

The strongest kind of study behind the peptide's effects, from an approved drug through human controlled trials and small human studies to animal work or nothing of its own. Animal results often fail to carry over to people.

Access

How people get it: as an approved drug, a compounded prescription, an over-the-counter supplement or from the grey market, where nobody checks the vial. The channel decides both the legal position and the risk of a bad batch.

Price per month

Thirty days of the typical dose, from its low end to its high end, priced at the listing a careful buyer would choose: in stock, from a shop scoring 4 of 5 on trust (third-party tested where no score is set), failing that 3, a pure pack before a blend, a European shop first, then the cheapest per mg. The range is the dose's, not the shops'. A per-dose amount counts once a day unless the dose says otherwise. Prices are in euros at ECB rates of 2026-10-29, before shipping; the shop table keeps each listing's price per mg, per gram for bulk supplements. Where no listing can be priced the researchers' own estimate stands in, and says so.

Dose users report

The middle half of the daily doses stated in at least five first-hand reports, vendor posts left out. Where its middle sits more than twice above or below the declared dose, the month is priced at it as well, since what people take is what they pay for.

Testing

Whether the shop publishes lab results: third-party tested means an independent lab checks each batch, own COA means the shop's own certificate of analysis, and no public tests means neither. A certificate shows purity, not safety.

Added peptide

Some packs sold under one peptide's name hold a second one, such as 5 mg GHK-Cu in a nasal kit, stated only in the description. Sprayed in the nose or injected it reaches the blood like an injection, so it carries the risk of that route and is tiered as the injectable form, whatever its tier on the skin. A pack whose page gives no contents list may hold more than its name.