HGH Fragment 176-191
AOD-like fragment · Frag 176-191 · Lipolytic fragment
Think of it as a fat-burning sidekick without the muscle-building hype.
HGH Fragment 176-191 is like the stripped-down version of the human growth hormone, focusing mainly on fat loss. Imagine it as a specialized tool that zeroes in on breaking down fat without triggering the usual growth hormone effects like muscle building or messing with your blood sugar levels.
Early research, mostly in animals, suggests that this fragment can boost the breakdown of fat while reducing the formation of new fat. It does this by tapping into specific signals in fat tissue, making it a potential ally for those looking to shed some extra pounds. However, it's worth noting that the human research is still in its early days, and most evidence comes from studies in rodents.
So, while it might sound promising for tackling stubborn fat, the jury's still out on how it performs in humans. Keep in mind that this is more of a targeted fat loss approach rather than a comprehensive weight-loss solution.
Who it's for
- Fitness enthusiasts looking to target stubborn fat areas
- Individuals interested in the metabolic aspects of fat loss
- Biohackers experimenting with non-anabolic peptide options
Probably not for you if…
- Those seeking muscle-building effects
- People relying solely on human evidence
- Anyone uncomfortable with limited human data
Editorial summary for research context · Not medical advice
Mechanism of Action
HGH Fragment 176-191 is a 16-amino-acid synthetic peptide corresponding to the C-terminal region of human growth hormone. Early preclinical research proposed that this fragment retains the lipolytic and anti-lipogenic properties of full-length GH while lacking the anabolic, hyperglycemic, and IGF-1-stimulating activity mediated by the GH receptor. Proposed mechanism involves stimulation of beta-3 adrenergic signaling in adipose tissue and modulation of lipolytic and lipogenic pathways. Human clinical evidence is limited; most published data comes from rodent obesity models. Note: a closely related clinical candidate, AOD9604, is a modified version of this fragment that failed to meet primary endpoints in human obesity trials.
Researched Benefits
Targeted lipolysis research
Rodent studies have shown increased fat oxidation and reduced adipose mass versus vehicle controls.
- [Ng et al. 2000]
No IGF-1 or glucose impact (in animal models)
Preclinical data suggest lipolytic activity without the insulin antagonism or anabolic effects of full-length GH — though human translation is unproven.
No GH receptor desensitization
Because the fragment does not engage the classical GH receptor, it theoretically avoids the desensitization concerns of direct GH or potent secretagogues.
Research Protocols
The following dosing ranges have appeared in published research protocols. Presented for informational purposes only — not a recommendation for human use.
Research protocol
- Dosage
- 500 mcg
- Frequency
- once daily
- Timing
- fasted morning or pre-cardio
- Cycle
- 8 weeks
Research protocols have commonly used 250-500mcg subcutaneous daily. Human efficacy data remains limited and the related clinical candidate AOD9604 did not meet obesity endpoints in trials.
Reported Side Effects
- Injection-site reactions
- Mild lethargy or fatigue reported anecdotally
- Hunger variability
- Long-term human safety data is lacking
Contraindications
- Active malignancy
- Pregnancy and lactation
- Known hypersensitivity to GH-derived peptides
Stacking Partners
Peptides commonly paired with HGH Fragment 176-191 in published research and protocol write-ups.
Vendor Pricing
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Gear + Companions
Reconstitution supplies and research-backed supplement companions for HGH Fragment 176-191. Editorial picks only — we earn a commission through Amazon on the click, no sponsorship.
Gear you'll need
· Reconstitution + storage essentialsBacteriostatic Water 30mL (0.9% Benzyl Alcohol)
Empower Pharmacy / generic medical supply
Reconstitutes every lyophilized peptide. 28-day viability refrigerated.
Insulin Syringes 31G × 5/16" × 0.5mL (100 count)
EasyTouch
31G × 0.5mL insulin syringes — the default size for sub-0.25mL peptide doses.
Alcohol Prep Pads (Sterile, 200 count)
Dynarex
Sterile 70% IPA prep pads — one per vial stopper + one per injection site.
1-Quart Sharps Disposal Container
BD / Becton Dickinson
FDA-cleared sharps container — pharmacies won't accept improvised disposal.
As an Amazon Associate we earn from qualifying purchases · Disclosed per FTC guidelines
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Research Papers
A novel analogue of human growth hormone (AOD9604) decreases body fat in obese mice
Ng FM, et al. · Hormone Research · 2000
PubMed 11146369 →