Carl read the papersWhat it actually is
HGH Frag 176-191 is the C-terminal fat-loss fragment of growth hormone.
It aims to burn fat without raising IGF-1 or blood sugar like real GH. AOD-9604 is a modified, stabilized version of the same fragment.
How it’s thought to work
- Lipolysis — stimulates fat breakdown, mimicking GH’s fat-metabolism region.
- Reduced lipogenesis — blocks new fat storage.
- No IGF-1/glucose spike — in theory, avoids GH’s growth/sugar effects.
- Fasted-dependent — food/insulin blunts the effect.
What the research says
Not approved for anything. Its cousin AOD-9604 failed to beat placebo for weight loss in human trials — so the fat-loss effect is largely anecdotal.
- Targeted fat metabolism (anecdotal).
- No IGF-1/glucose effect (in theory).
- Often stacked with a GHRH.
Reported protocols
These are the doses the peptide community actually reports running (Reddit & forums), alongside published research — logged for education, not as a recommendation to use.
| Parameter | Commonly reported range |
|---|---|
| Community dose | 250–500 mcg per dose (250 mcg once daily, or split AM/PM) |
| Frequency | 1–2× daily, always fasted |
| Route | SubQ |
| Cycle | ~4 weeks on, then a washout; often stacked with a GHRH |
| Community tip | Fasted timing is non-negotiable — eat near the dose and you kill the fat-burning effect |
Common use cases
| Goal | Community protocol notes |
|---|---|
| Fat loss | 250 mcg fasted 1–2×/day, ~4 wks + washout |
| Stacked with a GHRH | for synergy vs run solo |
| (Reality) | closest human evidence (AOD) failed vs placebo |
Mixing it (reconstitution)
Freeze-dried peptides must be reconstituted with bacteriostatic water before they can be measured. Carl’s calculator turns “mg in the vial + ml of water + target dose” into “units on the syringe” — and tells you how long the vial lasts.
→ Open the Reconstitution Calculator
Injection & handling
SubQ, 250–500 mcg, always on an empty stomach (AM fasted and/or a couple hours after the last meal). Refrigerate reconstituted, use within ~28 days.
Stacks it appears in
- Fat-loss GH combo — HGH Frag + Tesamorelin / CJC-Ipa — the fragment plus a GHRH.
