Peptides for muscle growth and body composition
The growth-hormone peptides — the ones marketed for lean mass, strength and recovery. Nearly all of them reliably raise growth hormone. Whether that translates into the body-composition change people buy them for is the question the grades answer.
Ranked by strength of evidence
- SSermorelin
Raises growth hormone / IGF-1 and modestly improves body composition in older adults
Formerly FDA-approved as Geref; withdrawn for commercial reasons, not safety.
Read the evidence → - SCJC-1295
Raises growth hormone and IGF-1 (sustained, for the DAC version)
The hormone rise is well established — that is a different claim from muscle gain.
Read the evidence → - S
- BCJC-1295
Builds muscle, burns fat, or improves body composition in people
The claim people actually buy it for.
Read the evidence → - B
- BIGF-1 LR3
Builds muscle or improves body composition in humans
A cell-culture reagent. No human study of it exists, and in pigs it reduced growth rather than increasing it.
Read the evidence →
The honest read
Note the split running through this page: 'raises growth hormone' grades well, 'changes your body' does not. Those are two different claims about the same injection, and the marketing for this category depends on you not noticing the distinction.
Looking at a different goal? Browse all use cases, or get every peptide’s grade on one page.