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HGH Fragment 176-191: HGH / Somatropin research guide
In short: HGH Fragment 176-191, C-terminal lipolytic domain of human growth hormone activating β3-adrenergic receptor-mediated lipolysis without IGF-1 effects. It is studied in preclinical (cell and animal) research and is supplied strictly for laboratory use, not for human or clinical use.
Not medical advice. HGH Fragment 176-191 is a research compound. This guide does not provide dosing, diagnosis, therapy recommendations, or claims about effects in humans.
HGH Fragment 176-191 at a glance
What to know first
Details and limits sit in the sections below. Research use only.
What HGH Fragment 176-191 is
HGH Fragment 176-191 is the synthetic C-terminal tail of growth hormone that captures the lipolytic (fat-burning) activity of the parent molecule without the growth or insulin effects.
One-paragraph overview from our research datasheet. Still scientific, but faster to read than the full mechanism list below.
HGH Fragment 176-191, C-terminal lipolytic domain of human growth hormone activating β3-adrenergic receptor-mediated lipolysis without IGF-1 effects.
Research contexts
Peer-reviewed papers discuss HGH Fragment 176-191 in specific lab settings. The points below reflect research questions, not health claims.
Research vs. personal use: Literature describes experiments in cells and animals. That is distinct from real-world use. Our products are for laboratory research only.
Typical study contexts
Why HGH / Somatropin research matters
Growth-hormone axis peptides are studied for GH/IGF signalling in animals and cells. Focus stays on endocrine biology, not prescribing.
Mechanisms (technical review)
Our datasheet lists mechanistic themes from preclinical work. These are research endpoints, not health claims.
Lab handling & preparation
Common Questions People Are Asking
What is HGH Fragment 176-191?
HGH Fragment 176-191 is a synthetic peptide corresponding to the C-terminal region (amino acids 176-191) of human growth hormone — the part that carries HGH's fat-metabolising (lipolytic) activity. It is studied for fat metabolism without the growth or IGF-1 effects of the full hormone. Supplied as a lyophilised research-grade powder for laboratory use only.
What is HGH Fragment 176-191 used for?
In the research literature HGH Fragment 176-191 is used as a tool compound to study lipolysis and fat metabolism — it is the lipolytic domain of HGH isolated from the growth-promoting domains. New-U supplies it strictly for in-vitro and animal-model research; it is not for human use.
Is HGH Fragment 176-191 legal?
HGH Fragment 176-191 is not a scheduled or controlled substance in most jurisdictions and can be sold and purchased as a research chemical for laboratory use. It is not an approved medicine, and it is on the WADA Prohibited List for competing athletes. Buyers are responsible for compliance with their local laws; New-U supplies it for research use only.
How is HGH Fragment 176-191 different from AOD-9604?
AOD-9604 is the same C-terminal lipolytic fragment with an N-terminal tyrosine added to the front for improved stability. The two share essentially the same β3-adrenergic / lipolysis mechanism, but AOD-9604 is the version that was actually carried through pharmaceutical development (multiple human clinical trials, including a Phase 2b obesity study), whereas the plain 176-191 fragment has little human research of its own. Both remain research tools.
How does HGH Fragment 176-191 compare with GLP-1 fat-loss peptides like semaglutide?
They work through completely different mechanisms. HGH Fragment 176-191 is a lipolytic peptide - it acts directly on fat cells via the β3-adrenergic pathway to mobilise stored triglycerides, without touching appetite. GLP-1 receptor agonists such as semaglutide instead reduce food intake through appetite and satiety signalling. The fragment is studied as a tool for fat-metabolism mechanisms, not as an appetite agent, and is supplied for laboratory research only.
Will HGH Fragment raise IGF-1 or blood sugar like real HGH?
No. That is the whole point of isolating this fragment - it does not bind the growth hormone receptor, so it does not trigger hepatic IGF-1 synthesis and does not produce the counter-regulatory insulin-opposing effects of full-length HGH. Preclinical and early clinical data are consistent on this.
Why is fasted administration recommended in research protocols?
Because insulin antagonises the cAMP/PKA signal that the fragment is trying to amplify. If you dose in a fed state with elevated insulin, the lipolytic signal is blunted. Research protocols typically use an empty-stomach or pre-cardio window.
How should HGH Fragment be stored?
Keep the lyophilised powder frozen at −20 °C. After reconstitution with bacteriostatic water, refrigerate at 1-6 °C and protect from light. The cyclic disulfide is relatively stable but the peptide itself is short-lived in solution, so plan your dosing window accordingly.
Is this page medical advice? Can I use HGH Fragment 176-191 for my health?
No, and no. This article is educational only. We do not provide dosing, medical recommendations, or health claims. Our products are sold strictly for laboratory research, not for personal use of any kind.
Where do I find HGH Fragment 176-191 specs, purity certificates and pricing?
Open the shop listing via “View product details.” There you will see batch specs, the Certificate of Analysis (COA), concentration, purity grade, and available SKUs with current pricing.
Related peptide guides
Other compounds researchers often read about alongside HGH Fragment 176-191.
Scientific sources & further reading
Primary literature and registries for HGH Fragment 176-191, plus mainstream coverage of the peptide category. Research use only - not medical advice.
Databases & literature:
Peptides in the news:
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Also known as: HGH Frag 176-191, AOD-9604 Precursor, GH Fragment, C-Terminal HGH Fragment, Lipolytic Fragment, Fat Loss Fragment, Tyr-hGH177-191
PRECISION. PURITY. PERFORMANCE.
Research peptides at >99% HPLC-verified purity, third-party tested by Janoshik Analytical & Freedom Diagnostics, with Certificates of Analysis published per released batch. Supplied strictly for laboratory research use.
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Research use only (RUO). All products are sold strictly for laboratory and research purposes — not for human or veterinary consumption. Purchasers must be 21 or older.
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