What HCG is
HCG is a gonadotropin analogue. A glycoprotein hormone that acts as an LH mimetic at testicular Leydig cell receptors, stimulating testicular steroidogenesis directly rather than through the pituitary.
Class and mechanism
HCG is a gonadotropin analogue. A glycoprotein hormone that acts as an LH mimetic at testicular Leydig cell receptors, stimulating testicular steroidogenesis directly rather than through the pituitary.
Where it sits
Post-cycle and hormonal support compounds fall into two families that are often confused: SERMs act at the oestrogen receptor, aromatase inhibitors reduce the conversion of androgens to oestrogen upstream.
Other names
HCG is also written as Human Chorionic Gonadotropin. The same molecule appears under more than one name, which is worth knowing when comparing listings between suppliers.
Others in the post-cycle and hormonal support range
HCG sits in the post-cycle and hormonal support 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 |
|---|---|---|---|
| Tamoxifen | Selective oestrogen receptor modulator (SERM) | 2 | £22 |
| Clomid | Selective oestrogen receptor modulator (SERM) | 1 | £22 |
| Arimidex | Non-steroidal aromatase inhibitor | 1 | £25 |
| Aromasin | Steroidal (suicidal) aromatase inhibitor | 1 | £35 |
| Letrozole | Non-steroidal aromatase inhibitor | 1 | £25 |
| HMG | Gonadotropin preparation | 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.
HCGin stock£25- SerenQ HCG 5000iu Peptide Penout of stock£45
Availability checked 2026-09-09. The product page carries live stock.