UK peptide reference
Peptides A–Z
A plain English reference to 116 compounds across 8 categories. For each one we give the UK legal status and, where there is one, the licensed alternative. We list no sellers and link to none.
Athletic performance · 8
ACE-031, also called ramatercept, is an experimental protein designed to trap myostatin and related signals so that muscle can grow. Its trials were stopped over safety concerns, and it has no UK marketing authorisation. It is prohibited in sport.
FLGR-242 is an experimental compound marketed in the muscle and performance area, with very little published information. It has not been through human trials, and it has no UK marketing authorisation.
Follistatin is a natural protein that can block myostatin, the body's brake on muscle growth. That has made it a target of muscle research, including gene therapy experiments. There is no approved follistatin product, and it is not a licensed medicine in the UK.
Follistatin 315 is one natural form of follistatin, the protein that can block myostatin, the body's brake on muscle growth. This is the form that mostly circulates in the blood. It is marketed for muscle, has little human evidence, and is prohibited in sport.
Follistatin 344 is a natural form of follistatin, the protein that can block myostatin, the body's brake on muscle growth. This form binds more strongly to cell surfaces. It is marketed for muscle, has little human evidence, and is prohibited in sport.
IGF-1 LR3 is a laboratory modified version of insulin like growth factor 1, a natural growth signal that works downstream of growth hormone. The changes make it last far longer in the body. It is marketed for muscle growth, has no UK marketing authorisation, and carries real safety concerns.
MGF, mechano growth factor, is a form of IGF-1 that muscle produces after exercise or injury. It is marketed for muscle repair and growth. The evidence is mostly from the laboratory, and it has no UK marketing authorisation. It is prohibited in sport.
PEG MGF is a longer lasting version of mechano growth factor (MGF), a form of IGF-1 linked to muscle repair. The pegylation is meant to make it last longer in the body. The evidence is mostly from the laboratory, and it has no UK marketing authorisation. It is prohibited in sport.
Factual reference only, not medical advice. “Research use only” labelling does not make an unlicensed product legal to sell as a medicine (MHRA). Report side effects through the MHRA Yellow Card scheme.