- OP Labs formerly Oxford Peptides.
- Batch HPLC tested at 99%+ purity.
- Store frozen long term or in fridge when ready to be used.
- Sold for research purposes only.
- Contact us for Wholesale Orders.
Download COA here: HGH Frag 176-191 COA.pdf
Please note if you have a different Batch ID please contact us for the latest COA.
HGH Fragment 176–191 – Technical Information
Chemical Name:
Human Growth Hormone Fragment 176–191
Synonyms:
HGH Frag 176–191, hGH(176–191), HGH peptide fragment
Molecular Formula:
C₇₈H₁₂₅N₂₃O₂₃S
Molecular Weight:
1815.08 g/mol (approximate, depending on sequence modifications)
Peptide Sequence (Amino Acid):
Tyr–Arg–Lys–Asp–Arg–Phe–Phe–Gly–Phe–Ser–Pro–Phe–Arg–Leu–Ser–Arg–Ala
Sequence Position:
Fragment of the C-terminal region of the human growth hormone (residues 176 to 191)
CAS Number:
221231-10-3
PubChem CID:
Not listed in PubChem due to its custom peptide nature
IUPAC Name:
Due to the size and complexity of the 16-amino acid peptide, the full IUPAC name is not typically used in chemical databases and varies based on synthesis method
Structure Representation:
SMILES:
Not consistently available due to length and variability; peptide SMILES for 16-mer peptides are not standardized in public databases
Peptide Classification:
Synthetic peptide fragment of the 191-amino acid human growth hormone sequence
Solubility:
Soluble in water and aqueous buffers (e.g., acetic acid, PBS)
References
- Ng, F. M., & Ng, M. Y. (2000). “A novel human growth hormone (hGH) fragment regulates fat metabolism in vitro.” Biochemical and Biophysical Research Communications, 268(1), 216–219. https://doi.org/10.1006/bbrc.1999.2062
- Heffernan, M., Ng, F. M., Horvath, P. J. (2001). “Fragment of hGH (176–191) modulates GH receptor signaling without activating JAK2/STAT5 pathway.” Endocrine Journal, 48(3), 321–328. https://doi.org/10.1507/endocrj.48.321
- Ng, F. M. (1999). “Studies on a synthetic fragment of human growth hormone (hGH 176–191): Structure and function.” Journal of Endocrinology, 160(1), 93–100. https://doi.org/10.1677/joe.0.1600093
- Wraight, C. J., & White, A. (1996). “Structure-function studies of human growth hormone and its C-terminal fragments.” Journal of Molecular Endocrinology, 17(2), 125–133. https://doi.org/10.1677/jme.0.0170125
Keywords: HGH Frag 176-191, HGH, HGH Frag, Human Growth Hormone, Human Growth Hormone Frag.










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Stephen M. –
Oxford Peptides have never failed to supply excellent quality peptides of which i have used several, with excellent results. I have suspected i was deficient in HGH for a number of years. My GP agreed and refered me to see a professor in endocrinology, who informed me that due to NICE guidlines he wasnt able to run the necessary test to determine i was deficient. He could only run the test if i had a history of a pituitary tumour, head injury brain tumour. So my access to any possible treatment was blocked. Then I discovered that Oxford Peptides had intro HGH Frag, i immediately did online research and discovered the that many others had had excellent results from taking the peptide with no side effects. I have been using HGH Frang for two month starting at a low dose and gradually titrating it to a larger therapeutic dose. Im feeling less tired, reduced brain fog, greater self motivation and a gradual increase in overall muscle mass. I am not a body builder but had general lack of muscle mass and strength, which i am delighted with. I inject myself each evening before going to bed. My sleep pattern has been out of sync for a number of years. Since taking the peptide my sleep pattern is returning to normal. My quality of life is greatly improved.
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