What HGH is
HGH is a recombinant human growth hormone (191 amino acids). A recombinant form of the 191-amino-acid pituitary hormone. Acts directly at the GH receptor and indirectly through hepatic IGF-1 production.
Class and mechanism
HGH is a recombinant human growth hormone (191 amino acids). A recombinant form of the 191-amino-acid pituitary hormone. Acts directly at the GH receptor and indirectly through hepatic IGF-1 production.
Where it sits
Growth hormone itself and the secretagogues that prompt its release are different things. Somatropin is the hormone. A secretagogue acts on the GHRH or ghrelin receptor to raise the body's own output.
Worth knowing
Supplied in iu rather than mg. Roughly 3iu corresponds to about 1mg for somatropin, though the iu figure on the label is the authoritative one.
Other names
HGH is also written as Human Growth Hormone, Somatropin and rhGH. The same molecule appears under more than one name, which is worth knowing when comparing listings between suppliers.
Others in the growth hormone and secretagogues range
HGH sits in the growth hormone and secretagogues group. The compounds below share that grouping, which is the useful starting point when comparing one against another: same group means the comparison is like for like, different group usually means it is not.
| Compound | Class | Listings | From |
|---|---|---|---|
| Ipamorelin | Growth hormone secretagogue (GHRP) | 3 | £28 |
| CJC-1295 (no DAC) | GHRH analogue | 2 | £33 |
| Tesamorelin | Stabilised GHRH analogue | 2 | £55 |
| HGH Fragment 176-191 | C-terminal fragment of human growth hormone | 1 | £75 |
| GHRP-2 | Growth hormone releasing peptide | 1 | £35 |
| GHRP-6 | Growth hormone releasing peptide | 1 | £35 |
Is it held in UK stock?
Stock held in the UK ships domestically, with no customs step. The product page carries live stock rather than a cached figure.
- SerenQ HGH 30iu Peptide Penin stock£60
HGH - 2Ktropinin stock£140
HGH - Genxtropinin stock£150- SerenQ HGH 100iu Peptide Penin stock£165
- SerenQ HGH Fragment 176-191 15mg Peptide Penout of stock£75
- Quanta Pharma HGH 100iu Kitout of stock£150
Availability checked 2026-09-09. The product page carries live stock.