Does CJC-1295 build muscle?
Two controlled studies in healthy adults found it raised growth hormone and IGF-1. They didn’t establish that anyone built more muscle or recovered faster.
2 of 16 in Every Peptide Explained in 10 Minutes (Human Studies Only)
What the human studies found
- Designed to keep growth hormone elevated for longer. A 2026 review describes it being promoted for muscle growth, fat metabolism and recovery.
- Two placebo-controlled studies in healthy adults: growth hormone and another growth-related hormone, IGF-1, went up. That’s a measurable effect.
- Those studies didn’t establish that participants built more muscle or recovered faster from training. A hormone result and a benefit you can feel are separate steps.
The studies (1)
Also cited
We checked the human research behind 16 peptides. The question wasn’t just “is there a study?” It was “does that study support the pitch?” For each one: who took part, what was measured, and what actually changed.
Watch all 16, explained: the film on YouTube · 9:42An approval, a trial or a paper belongs to a particular substance and a particular use. None of it verifies the contents of a bottle sold online. This is an investigation of the claims, not a guide to taking them.
Get the free 3-question checklist
The three questions we asked of all 16 peptides, plus each new investigation when it drops. No spam, unsubscribe anytime.