muscle building peptides
Muscle building peptides, all in one place.
Most muscle and performance peptides work through the growth-hormone axis. PepEasy is the one place to understand them, run the reconstitution math, and track every protocol — clearly and privately.
Educational only — not medical advice. PepEasy never recommends a dose.
Muscle building peptides are mostly growth-hormone secretagogues — compounds that prompt the body to release its own growth hormone and IGF-1, the pathway behind lean mass and recovery. The best-known examples include CJC-1295, Ipamorelin, MK-677, Tesamorelin, and Sermorelin. PepEasy is where you learn about each one, calculate doses, and track your protocol.
How muscle building peptides work
Most peptides in the muscle and performance space act on the growth-hormone axis. GHRH analogs like CJC-1295, Sermorelin, and Tesamorelin prompt the pituitary to release GH, while ghrelin-receptor agonists like Ipamorelin and the oral MK-677 trigger a GH pulse through a complementary pathway. Because these two mechanisms work together, GHRH analogs and GHRPs are often paired. PepEasy gives you cited, evidence-graded answers on each, plus the tools to run the numbers and stay organized.
The core muscle and performance peptides
Learn each one, then calculate and track it in PepEasy.
CJC-1295
A GHRH analog in long-acting DAC and short-acting no-DAC forms — the classic partner to Ipamorelin.
Ipamorelin
The selective, gentle GHRP that delivers a clean GH pulse with minimal cortisol or prolactin effect.
MK-677
The oral, once-daily ghrelin mimetic — the most clinically studied compound in the category.
Tesamorelin
An FDA-approved GHRH analog with randomized clinical trial data behind it.
Sermorelin
A GHRH analog with real clinical history, commonly prescribed today as a compounded peptide.
Build your stack the organized way.
Calculate reconstitution, log every dose, and track your full protocol in one private, local-first app.
Frequently asked
Which muscle building peptides are usually paired?+
GHRH analogs and GHRPs act through complementary pathways, so CJC-1295 is commonly paired with Ipamorelin. PepEasy makes tracking a stack like that simple.
Are any of these FDA-approved?+
Tesamorelin is FDA-approved for a specific indication; others, like Sermorelin, have clinical history and are prescribed as compounded peptides. PepEasy gives you cited answers on the status of each.
Does PepEasy recommend doses for these peptides?+
No. PepEasy is educational and a calculator and tracker. It helps you understand each peptide and run the math; dosing decisions belong with a qualified healthcare professional.
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