Best Peptides for Muscle Growth & Performance
The peptides most studied for muscle growth are growth-hormone secretagogues such as CJC-1295, ipamorelin, MK-677 (ibutamoren), sermorelin and tesamorelin, which stimulate the body’s own growth-hormone release. IGF-1 LR3 and follistatin are also researched for lean-mass pathways.
Most "muscle" peptides are growth-hormone secretagogues — they prompt the pituitary to release more of the body’s own growth hormone rather than supplying hormone directly. The classic research pairing is a GHRH analog (CJC-1295) with a ghrelin-mimetic (ipamorelin). Oral MK-677 works through a similar pathway. A separate group (IGF-1 LR3, follistatin, PEG-MGF) targets muscle-growth signaling more directly and carries higher uncertainty. Evidence quality varies widely — graded below.
Most-studied compounds for muscle growth & performance
Each links to a full research protocol with reconstitution steps, research dose ranges reported in the literature, and an honest evidence grade. Ranked roughly by depth of supporting research.
CJC-1295 + Ipamorelin
The most commonly studied research pairing — a GHRH analog plus a selective GH secretagogue, researched together for steadier GH release.
Ipamorelin
A selective GH secretagogue valued in research for stimulating GH with minimal effect on cortisol or appetite.
CJC-1295 (no DAC)
A short-acting GHRH analog studied for pulsatile GH release, often paired with a secretagogue.
MK-677
Ibutamoren — an orally active GH secretagogue studied for sustained increases in GH and IGF-1.
Tesamorelin
A GHRH analog with human data, studied for body-composition and visceral-fat outcomes.
Sermorelin
One of the earliest GHRH analogs, researched for GH stimulation with a long clinical history.
IGF-1 LR3
A long-acting IGF-1 variant studied for direct muscle-growth signaling; potent and higher-risk in research models.
Hexarelin
A potent GH-releasing peptide studied for strong GH stimulation.
Follistatin-344
Researched for myostatin inhibition and muscle-mass pathways; largely preclinical.
PEG-MGF
A pegylated mechano-growth factor studied for muscle repair after mechanical stress.
Sourcing these compounds for research
Researchers studying the molecules above source cGMP-tested material from our official sponsor, LiveWell Peptides. All compounds are sold strictly for laboratory research use.
Preferred vendor. For research use only. Not for human consumption. Not medical advice.
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