Claimed effect · Ipamorelin

Does Ipamorelin help with body composition?

D
Grade D — no human evidenceNone controlled · effect size: not measurable
Short answerNo human evidence. As of 2 September 2026, only none controlled exist for Ipamorelin for body composition. No trial has measured muscle or fat change in people.

What the studies show

No trial has measured muscle or fat change in people.

Animal studies, cell studies, or anecdotes only. This is where almost every viral peptide sits. Promising and proven are different words for a reason.

In context

Ipamorelin is a synthetic five-amino-acid peptide that stimulates growth-hormone release with little effect on cortisol or prolactin. Small early studies confirmed the hormone release; the only randomised trial — 117 bowel-surgery patients, testing it for post-operative gut recovery — found no benefit, and development stopped. It is not an approved medicine anywhere, and the popular claims about muscle, fat loss and sleep have never been tested in a trial.

Ipamorelin is not approved. Legal status differs by country — see the regulation section or the jurisdiction pages.

Questions

Is Ipamorelin proven to help with body composition?
No. There is no human evidence for it (None controlled); the claim rests on animal or cell studies and LYO grades it D.
What studies are behind the grade?
No trial has measured muscle or fat change in people.
Is Ipamorelin approved for this?
No. Ipamorelin is not approved; it is not an approved medicine for any indication in the jurisdictions LYO covers.

Other outcomes for Ipamorelin

Reviewed 2 September 2026. Grades count human evidence only; see how LYO grades. Not medical advice. Correct this page →