peptides
HGH 12IU
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About this product
Human Growth Hormone (HGH): Peptide Hormone for Growth, Metabolic, and Tissue Repair Research
HGH 12IU — Compound Overview
HGH stands for human growth hormone. The recombinant, 191-amino-acid form is known as somatropin and is classified as a protein hormone.
Somatropin is produced using recombinant DNA technology. Its identity is defined by its amino acid sequence and folded protein structure. The 12 IU designation describes the listed biological activity in International Units, rather than the weight of powder in the vial.
Structure and Composition
Somatropin consists of a single chain of 191 amino acid residues. The chain folds into a three-dimensional structure containing two internal disulphide bonds.
These bonds connect cysteine residues at positions 53 and 165, and at positions 182 and 189. They form part of the protein’s structural identity alongside its amino acid sequence.
The reference molecule has a molecular mass of approximately 22.1 kilodaltons. This describes the size of an individual protein molecule and is separate from the activity declared for a product.
HGH Compound Information
| Property | Details |
| Compound name | Somatropin |
| Common terminology | Recombinant human growth hormone; r-hGH; HGH |
| Classification | Recombinant protein hormone |
| Amino acid count | 191 residues |
| Protein structure | Single polypeptide chain with two internal disulphide bonds |
| Disulphide linkages | Cys53–Cys165 and Cys182–Cys189 |
| CAS number | 12629-01-5 |
| Molecular mass | Approximately 22.1 kDa |
| Listed activity | 12 IU |
| Activity unit | International Units |
Understanding Compound Specifications
The terms HGH and human growth hormone are broad descriptions. Somatropin identifies the recombinant protein with the established 191-residue sequence, distinguishing it from shorter fragments and other modified growth-hormone compounds.
International Units describe biological activity measured against a reference standard. They are different from milligrams, which measure mass, and do not describe the total powder weight or a recommended dose.
Protein identity, purity and biological activity are separate measurements. An identity result establishes which protein is present, while purity and activity testing examine different characteristics of the preparation.
Frequently Asked Questions
What is HGH studied for?
HGH is studied for its role in growth regulation, metabolism, tissue repair, and IGF-1 mediated signalling pathways.
Is HGH naturally produced in the body?
Yes. HGH is naturally secreted by the pituitary gland in a pulsatile manner, with highest release during sleep.
Why is HGH important in ageing research?
Endogenous HGH levels decline with age, which has been associated with changes in body composition, bone density, and metabolic function.
Does HGH act directly on tissues?
HGH acts both directly via growth hormone receptors and indirectly through stimulation of IGF-1 production.
Is HGH approved for general human use?
No. This product is supplied for research purposes only and is not approved for human consumption.
