Description
HGH-Frag (human growth hormone fragment 176–191) is a research peptide used in controlled in-vitro studies of peptide pharmacology, receptor-adjacent signalling, and structure–activity relationships under non-clinical laboratory conditions.
HGH-Frag (Fragment 176–191) — 5 mg | Research Use Only
This listing provides a 5 mg vial of HGH-Frag as a lyophilised solid for cell-based and biochemical model systems. Investigations focus on molecular mechanisms and assay readouts only. For laboratory research only. Not for human use.
Key features
C-terminal hGH fragment (176–191) for in-vitro signalling and SAR investigations. Supplied as a lyophilised solid for straightforward handling and storage. Unit size: 5 mg per vial. Each batch released after stringent internal quality checks.
Specifications for HGH-Frag
Product name: HGH-Frag (Fragment 176–191) Synonyms: hGH 176–191; Growth hormone fragment 176–191; Somatotropin fragment Class: Peptide fragment (research use) Form: Lyophilised powder Appearance: White to off-white solid Note: Salt/counter-ion and hydration state may vary. Refer to the vial label for lot-specific details.
Handling & storage of HGH-Frag
Storage (dry): Keep vials at 2–8 °C, protected from light and moisture. Reconstitution: For step-by-step guidance, see our internal guide: Reconstituting & Storage. After reconstitution: Store at 2–8 °C, protect from light, use aliquots to reduce handling, and avoid repeated temperature cycling. Compatibility: Use only within research protocols that follow your lab’s SOPs and local regulations.
Important: Free empty 10 ml vial included (HGH-Frag is gel-prone)
Every HGH-Frag order includes a free empty 10 ml vial. HGH-Frag can be gel-prone at higher concentrations. For best laboratory handling, we recommend preparing a minimum total volume of 5 ml after reconstitution to reduce the chance of gelling.
Step 1: Reconstitute HGH-Frag in the original peptide vial with 2 ml of diluent. Step 2: Transfer the solution to the included empty 10 ml vial. Step 3: Add additional diluent to reach a minimum total volume of 5 ml.
Note: If HGH-Frag is reconstituted into too small a volume, it may gel, particularly with high-purity material.
Looking for complementary materials? See the guide above and related GH-axis research peptides such as AOD-9604 5 mg, CJC-1295 (No DAC) 5 mg, and Ipamorelin 5 mg.
About HGH-Frag in research
Researchers use HGH-Frag (176–191) to examine peptide fragment behaviour in cell systems, profile downstream second-messenger responses, and compare structure–activity relationships alongside other GH-axis reagents. These investigations occur exclusively in controlled, non-clinical in-vitro environments.
Synthesis & quality
Manufactured via controlled, validated peptide-synthesis processes to deliver high purity and lot-to-lot consistency. Each batch undergoes identity, purity, and appearance checks before release.
Legal & safety
XL Peptides supplies materials strictly for laboratory research. Products are not medications, foods, supplements, or cosmetics; not for human or veterinary use. By purchasing, you confirm you are a qualified researcher and will handle the material in line with your institution’s policies and applicable laws.
FAQs about HGH-Frag
Why is an empty 10 ml vial included? HGH-Frag can be gel-prone at higher concentrations. The empty 10 ml vial supports preparation at a higher total volume (minimum 5 ml) for improved handling in research workflows.
Where can I find reconstitution guidance? See our step-by-step internal guide: Reconstituting & Storage.
Is this product for human use? No. This material is for research only and is not intended for human consumption or clinical applications.
External resources for researchers
PubMed — Growth hormone fragment 176–191 (search) Google Scholar — hGH 176–191 (literature search)
Related research peptides
AOD-9604 5 mg CJC-1295 (No DAC) 5 mg Ipamorelin 5 mg Bacteriostatic Water 10 ml
Disclaimer
Used solely for in vitro experiments and cannot be:
Used in clinical trials involving humans Administered to humans as part of an experiment or investigation Supplied to another party for human investigational use
XL Peptides works with various third-party laboratories to provide testing reports for all its manufactured products.
Date
Batch No
Issuing Lab
Lab Report
View QR
11-Mar-26
240B9
View Report ;
To find out more about our testing policy, please visit our Testing page.