HGH vs Testosterone
HGH and Testosterone are compared here on the things that actually differ between them: what class each belongs to, what each acts on, how each is supplied and what each costs per milligram. Where the registry has no figure for one of them the row is left out rather than filled in.
Side by side
| HGH | Testosterone | |
|---|---|---|
| Class | Recombinant human growth hormone (191 amino acids) | Endogenous androgen; the reference androgen |
| Acts on | A recombinant form of the 191-amino-acid pituitary hormone. Acts directly at the GH receptor and indirectly through hepatic IGF-1 production. | The principal endogenous androgen in men, acting at the androgen receptor and, via aromatase, as the substrate for endogenous oestradiol. Supplied as esters, which alter release rate but not the parent hormone delivered. |
| Supplied as | Lyophilised powder supplied in international units (iu), commonly as 10iu vials in 100iu kits, or as a pre-filled pen. | Oil solution for intramuscular injection, supplied as single esters or blends. Common esters: propionate, isocaproate, enanthate, cypionate, undecanoate. |
| Half-life | Short in circulation, typically two to three hours; downstream IGF-1 elevation persists considerably longer. | Determined entirely by the ester. Propionate roughly 0.8 days; enanthate about 4.5 days; cypionate about 5 days; undecanoate substantially longer. |
| Storage | Refrigerated at 2-8 C both before and after reconstitution. Never frozen. Growth hormone is a folded protein and loses activity if frozen or shaken vigorously. | Room temperature, out of direct light. Crystallisation in cold conditions is a physical change, not degradation, and redissolves with gentle warming. |
| Listings | 6 | 9 |
| Price from | £60 | £18 |
What actually differs
The clearest difference is class: HGH is a recombinant human growth hormone (191 amino acids), Testosterone is an endogenous androgen; the reference androgen. They are not supplied the same way. HGH comes as a lyophilised powder supplied in international units (iu), commonly as 10iu vials in 100iu kits, or as a pre-filled pen, Testosterone as an oil solution for intramuscular injection, supplied as single esters or blends. Common esters: propionate, isocaproate, enanthate, cypionate, undecanoate. Half-life differs as well: Short in circulation, typically two to three hours; downstream IGF-1 elevation persists considerably longer for HGH against Determined entirely by the ester. Propionate roughly 0.8 days; enanthate about 4.5 days; cypionate about 5 days; undecanoate substantially longer for Testosterone.
What is HGH?
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.
What is Testosterone?
Testosterone is an endogenous androgen; the reference androgen. The principal endogenous androgen in men, acting at the androgen receptor and, via aromatase, as the substrate for endogenous oestradiol. Supplied as esters, which alter release rate but not the parent hormone delivered.
- SerenQ HGH 30iu Peptide Penin stock£60
HGH - 2Ktropinin stock£140
HGH - Genxtropinin stock£150- SerenQ HGH 100iu Peptide Penin stock£165
Quanta Pharma Fem-Testin stock£18
Quanta Pharma Testosterone Propionatein stock£25
Quanta Pharma Testosterone Isocaproatein stock£30
Quanta Pharma Testosterone Enanthatein stock£34
Availability checked 2026-09-09. The product page carries live stock.