Cluster · Muscle, recovery, GH-pathway
Performance peptides
Peptides marketed for muscle growth, recovery, and tapping the growth-hormone axis, BPC-157, TB-500, ipamorelin, CJC-1295, IGF-1 LR3, MK-677. None of these are approved for performance. Most of what you read on forums rests on animal studies, small open-label trials, or vendor copy. Many are explicitly banned in sport by WADA. Popularity here is not the same as proof.
!Every peptide in this cluster is either banned by WADA or risks being treated as such if you compete.
CCCDDDDDD
Ipamorelin
GH secretagogue; limited human data, popular in recovery stacks.
MK-677 (Ibutamoren)
Oral GH secretagogue (not strictly a peptide); some human data, raises glucose.
Sermorelin
GHRH analogue once approved for GH deficiency; modest human evidence.
BPC-157
Hugely popular for healing; strong animal data, no controlled human trials yet.
CJC-1295
GHRH analogue often paired with ipamorelin; evidence is thin in humans.
Follistatin
Blocks myostatin, the body's brake on muscle growth; the science is real, but the injectable peptide sold to bodybuilders is unproven and doping-relevant.
Hexarelin
Older GHRP, more potent than ipamorelin but with worse side-effect profile; never approved.
IGF-1 LR3
Long-acting IGF-1; bodybuilding favourite with real safety concerns.
TB-500
Thymosin Beta-4 fragment; promoted for recovery, evidence is preclinical.
Cluster assignment reflects each peptide’s primary intent, its main reason for being on the site. Some peptides span clusters in practice (tesamorelin is approved for HIV-associated visceral fat but is also chased by bodybuilders); we file each under one canonical cluster and link out where the cross-over matters.