Encyclopedia entry

Peptide therapy for muscle growth

"Peptide therapy for muscle growth" refers to research peptides marketed by some clinics around growth-hormone support, such as ipamorelin, CJC-1295 and sermorelin. In the UK these are sold under research-use-only wording. There are no published human randomised trials supporting them for muscle growth, and several sit on the WADA prohibited list, so tested athletes must avoid them. This page describes the regulatory position; it is not a protocol and makes no efficacy claim.

The peptides people mean

• · Growth-hormone secretagogues: ipamorelin, CJC-1295, sermorelin, hexarelin.
• · Repair-associated research peptides: BPC-157, TB-500.
• · All are marketed around recovery or growth-hormone support, and all are sold research use only.

Regulatory and evidence status

These peptides hold no UK marketing authorisation for human therapeutic use, and the research-use-only label does not authorise human treatment. The literature is largely preclinical and animal-model; there are no human randomised trials for the marketed muscle-growth uses. PeptideClear reports this position as encyclopedia information and does not publish dosing, protocols or human-use instructions.

The WADA point for athletes

Several of these peptides are on the World Anti-Doping Agency prohibited list. Any athlete subject to testing should treat them as prohibited substances regardless of how they are marketed.

Related: What is peptide therapy · WADA prohibited list and peptides · "Research use only" framing · Research peptides.