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HGH Fragment 176-191 vs AOD-9604 Fat Loss Dosing

9 min read · Updated May 22, 2026

By the DosingCalc editorial team. Numbers and dose ranges are checked against the sources listed on our editorial standards page. Last reviewed May 22, 2026.

Medically reviewed by Elena Whitmore, PharmD.

Photograph illustrating hgh fragment 176-191 vs aod-9604 fat loss dosing

HGH Fragment 176-191 and AOD-9604 both aim at fat loss. The two are closely related but not identical. AOD-9604 is the 176-191 fragment with an added N-terminal tyrosine for stability, and almost all of the research belongs to AOD-9604. HGH Fragment 176-191 itself has essentially no human research of its own, so most effects attributed to it are extrapolated from AOD-9604 rodent and early-human data (AOD9604, Wikipedia). In rodent studies the compound kept HGH's lipolytic action without raising IGF-1 or affecting blood glucose (Heffernan M et al. 2001, Endocrinology, PMID 11713213), though this has not been confirmed in humans. You reconstitute 5 mg vials the same way and inject subQ every day. Community-reported protocols put HGH Frag at 250 to 500 mcg for stubborn belly fat and AOD-9604 around 300 mcg split up. These are anecdotal research conventions, not clinically established doses. Grab our AOD-9604 calculator or read through the protocols below.

Reconstitute your 5 mg vials right

Take a 5 mg vial of HGH Fragment 176-191 or AOD-9604. Bacteriostatic water only. No plain sterile stuff.

  1. Wipe the vial top with an alcohol swab.
  2. Draw 2 ml bacteriostatic water into a 3 ml syringe.
  3. Drip the water slowly down the side of the vial. Don't blast the powder.
  4. Let it sit 10 minutes. Roll gently to mix. Skip the shaking.
  5. You get 5 mg in 2 ml. That's 2500 mcg per ml, or 250 mcg per 0.1 ml.

Use a 1 ml insulin syringe with 0.01 ml marks. 0.1 ml pulls 250 mcg, and 0.2 ml gets 500 mcg. Keep mixed vials in the fridge at 2 to 8°C and use them within 28 days. Freeze unopened ones at -20°C for up to 1 year. Let them warm to room temp before you draw. These are general bacteriostatic-water storage conventions, not peptide-specific stability data.

For exact pulls, use the AOD-9604 calculator, or check the HGH calculator for stacks.

HGH Fragment 176-191 dosing protocols

Community-reported protocols run HGH Frag at 250 to 500 mcg a day, with doses over 300 mcg split to keep levels even. The weight-based heuristic is 2 to 5 mcg per kg. These per-kg targets are anecdotal conventions with no clinical derivation. The arithmetic below is internally consistent, but the figures are not clinically established.

  • 70 kg person: 140 to 350 mcg daily. Start at 250 mcg.
  • 80 kg: 160 to 400 mcg. Try 300 mcg.
  • 90 kg: 180 to 450 mcg. Aim for 350 mcg.
  • 100 kg: 200 to 500 mcg. Don't go past 500 mcg.

Morning protocol

Shoot 250 to 300 mcg first thing on an empty stomach, then wait 20 minutes before eating. Do it 5 to 7 days a week. Community-reported cycling runs 4 to 8 weeks on, 2 weeks off. The rationale for fasted morning shots is anecdotal. No human pharmacokinetic study has established peak-effect timing for either peptide.

For an 80 kg person, days 1 to 28:

  • 6 AM: 0.12 ml (300 mcg) subQ into belly fat.
  • Black coffee's fine. No calories until 7 AM.

Pre-workout protocol

30 minutes before cardio or weights: 250 to 400 mcg. The timing rationale is anecdotal, and no human PK data establishes when the effect peaks. 5 days on, 2 off.

75 kg gym rat example:

  • 5 PM workout: Inject 0.1 ml (250 mcg) at 5:30 PM.
  • Hit 45 minutes steady cardio at 65% max heart rate.

Stack it with the CJC-1295 / Ipamorelin calculator at 100 mcg each before bed. That pushes natural GH and doesn't clash with the fat-loss dose.

AOD-9604 dosing protocols

Community-reported protocols run AOD-9604 at 250 to 500 mcg daily, usually split morning and afternoon. The anecdotal weight-based heuristic is 3 to 6 mcg per kg. There is no published mcg/kg dosing study for either peptide, so these per-kg targets have no clinical derivation.

  • 70 kg: 210 to 420 mcg. Start 300 mcg split.
  • 80 kg: 240 to 480 mcg. Total 300 mcg.
  • 90 kg: 270 to 540 mcg. Max 400 mcg split.
  • 100 kg: 300 to 600 mcg. Keep under 500 mcg.

Splitting the dose keeps lipolysis steadier through the day.

Morning protocol

200 to 300 mcg when you wake up. Empty stomach. Optional second dose 4 hours later. 5 on, 2 off. Community-reported cycles last 4 to 12 weeks.

80 kg daily:

  • 7 AM: 0.12 ml (300 mcg) subQ.
  • No food for 30 minutes after.

Pre-workout protocol

150 mcg 30 minutes before training, plus 150 mcg in the morning. The idea is to have it working while you train.

70 kg pre-gym:

  • 6 AM: 0.06 ml (150 mcg).
  • 4 PM: 0.06 ml (150 mcg) before cardio.

Community-reported protocols run AOD up to 12 weeks, though no published evidence establishes a safe or effective 12-week human protocol. Tweak volumes with the AOD-9604 calculator.

Side-by-side comparison table

AspectHGH Fragment 176-191AOD-9604
Daily Dose250 to 500 mcg250 to 500 mcg split
mcg/kg2 to 53 to 6
Best TimingMorning fastedMorning + afternoon
Vial Reconstitution (5 mg / 2 ml)250 mcg / 0.1 ml250 mcg / 0.1 ml
Cycle Length4 to 8 weeks4 to 12 weeks
Fat TargetStubborn belly, visceralOverall oxidation
Injection Frequency1 to 2x day1 to 2x day

Inject subQ into low-fat spots like the abdomen or thigh, and rotate sites.

Mcg per kg calculations explained

Match doses to your weight. The per-kg targets here are community heuristics, since there is no published mcg/kg dosing study for either peptide, but the arithmetic itself is internally consistent.

Formula: Target mcg/kg times your kg equals daily total.

HGH Frag at 4 mcg/kg moderate:

  • 60 kg: 240 mcg (0.1 ml)
  • 85 kg: 340 mcg (0.14 ml)
  • 110 kg: 440 mcg (0.18 ml)

AOD-9604 at 4 mcg/kg, split twice:

  • 60 kg: 120 mcg x2 (0.05 ml each)
  • 85 kg: 170 mcg x2 (0.07 ml each)
  • 110 kg: 220 mcg x2 (0.09 ml each)

Under 60 kg? Start at 2 mcg/kg. Over 110 kg? Cap the total at 500 mcg, since returns drop off past that.

Stack with the Semaglutide calculator for appetite control alongside these fat burners.

Morning injections: why and how

Morning shots mimic fasting GH pulses. Inject subQ about 2 inches from your navel. Pinch the skin, use a 45-degree angle, and a 29-31G needle.

80 kg protocol for either:

  1. Wake up. Pee. Skip food.
  2. Draw 0.12 ml (300 mcg).
  3. Inject. Hold 5 seconds.
  4. 20 minutes later: Water or coffee.

Run 6 days a week and measure your waist weekly. Anecdotally, users report a 0.5 to 1 cm waist drop in 4 weeks alongside a diet, but that is a community-reported expectation, not a trial outcome. The only human efficacy data (AOD-9604 Phase 2b and later Metabolic Pharmaceuticals trials, reported via press release with no PMID) did not show statistically significant weight loss versus placebo.

Pairing morning HGH Frag with a fasted walk is a common community practice, but there is no human PK or fasted-timing efficacy data for either peptide to back it up.

Pre-workout protocols for fat burn

Inject 30 minutes before exercise. Cardio works best here, something like LISS for 30 to 45 minutes at 60 to 70% max HR.

HGH Frag pre-workout for 90 kg:

  • Draw 0.14 ml (350 mcg).
  • Inject thigh.
  • 30 minutes later: 40 minutes bike or incline walk.

AOD split pre-workout:

  • Morning 150 mcg.
  • Pre: 200 mcg.
  • Total 350 mcg.

Post-workout protein shake is fine. Skip carbs if you're cutting.

Add the TB-500 calculator at 2.5 mg twice a week for recovery during heavy training.

Storage tips that save your vials

  • Unmixed 5 mg vials: Room temp short-term. Fridge 2 to 8°C best. Freezer -20°C up to 1 year.
  • Mixed: Fridge only at 2 to 8°C. Use in 28 days. No freezing after mixing.
  • Travel: Cooler bag with ice packs. Stay under 37°C.
  • Syringes: Keep dry. New one each time.
  • Light: Store vials in the dark. Brown bag works.

Bad storage clumps the powder or makes it dissolve slowly. If that happens, toss the vial.

Stacking for better fat loss

Running one on its own is fine. Stacking can speed things up.

Track progress with weekly photos, the scale, and a tape measure. No change in 2 weeks? Bump the dose 10%.

Diet and training to improve results

These peptides work best in a 500 kcal deficit, with 1.6 g protein per kg and around 150 minutes of cardio a week.

80 kg cutting day:

  • Fast till noon after 300 mcg morning.
  • Meal 1: 40 g protein shake.
  • Workout: 45 min cardio after pre dose.
  • Total calories: 2200.

Use an app for macros, and sleep 7 to 9 hours to support GH pulses.

Troubleshooting common issues

Redness? Ice it for 2 minutes after the shot and rotate sites. Water retention? Cut sodium, though this is rare. No results? Add 50 mcg or double-check your mix. Headaches? Drink more water, or drop the dose.

Advanced protocols

Community-reported 12-week AOD lean-out for 85 kg (no published evidence supports a 12-week human protocol): Weeks 1-4: 300 mcg AM. Weeks 5-8: 200 mcg AM + 150 mcg pre. Weeks 9-12: 250 mcg AM + 200 mcg pre.

HGH Frag burst: 500 mcg AM for 4 weeks. Off 2. Repeat.

Women: community-reported practice cuts doses in half, so 125 to 250 mcg to start, though there is no sex-specific dosing study for either peptide.

Consult a healthcare professional before using any peptides. These protocols are for informational purposes based on user reports and not medical advice.

References

  1. Heffernan M, Summers RJ, Locher A, et al. "The effects of human GH and its lipolytic fragment (AOD9604) on lipid metabolism following chronic treatment in obese mice and beta(3)-AR knock-out mice." Endocrinology, 2001. PubMed
  2. "AOD9604." Wikipedia. Link

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Frequently asked questions

Which is better for fat loss: HGH Fragment 176-191 or AOD-9604?

Both target fat loss without HGH's growth effects. HGH Fragment 176-191 shines at 250 to 500 mcg daily for stubborn fat. AOD-9604 works well at 300 mcg per day split into doses. Pick based on your routine—morning for HGH Frag, pre-workout for AOD.

How do I reconstitute a 5 mg vial of these peptides?

Add 2 ml bacteriostatic water to a 5 mg vial for 250 mcg per 0.1 ml on both. Use a 1 ml insulin syringe. Store refrigerated after mixing.

What's the mcg per kg dose for HGH Fragment 176-191?

For an 80 kg person, 3 mcg per kg means 240 mcg daily. Round to 250 mcg. Scale up or down from there.

Can I stack these with other peptides like Ipamorelin?

Yes, stack HGH Frag or AOD with [Ipamorelin calculator](/calculator/ipamorelin) at 200 mcg nightly for GH boost without interfering with fat loss.

Morning or pre-workout—which timing works best?

Morning injections on an empty stomach mimic fasting fat burn for both. Pre-workout 30 min before cardio amps lipolysis during exercise.

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