Encyclopedia / Body Composition

Ipamorelin.

Selective GH pulses without the cortisol-and-ghrelin baggage.

Body CompositionAnti-agingSleepSubcutaneous injection

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Evidence

What the research shows

Ipamorelin is valued for one reason: it delivers a cleaner growth-hormone secretagogue profile than older GHRPs, with minimal cortisol, prolactin, or ghrelin elevation. In current peptide practice, it is most often paired with CJC-1295 because the GHRH + GHRP combination produces synergistic GH pulses rather than blunt, non-physiologic stimulation. The strongest number in this category comes from CJC-1295 data, where IGF-1 elevation reached 1.5–3× baseline and persisted up to 28 days per dose, which helps explain why the stack remains the most popular GH-secretagogue protocol. On its own, Ipamorelin’s appeal is selectivity: users pursuing recovery, body-composition support, and overnight GH signaling generally prefer it over older compounds that drive more hunger or off-target hormone release. Human research here is more protocol-driven than large modern outcome-trial driven, but interest remains high because it fits a precision-biohacking goal: stronger GH signaling with less noise.

Protocol

Cycle and dosing notes

You typically run Ipamorelin at 200–300 mcg subcutaneously at bedtime in a fasted state. The most common protocol pairs it with 100 mcg CJC-1295 in the same evening injection to capitalize on synergistic GH pulses. You follow a 5-days-on, 2-days-off weekly rhythm rather than continuous daily use. Most users structure cycles at 12–16 weeks, then take a 2–4 week break before reassessing labs, recovery, sleep quality, and body-composition response.

Safety

What to watch for

Very clean profile. Minimal side effects reported.

Best for

Who benefits most

This is for the research-driven user who wants GH-axis support without jumping straight to harsher, less selective secretagogues. If you care about recovery, sleep quality, leaner body composition, and a more refined bedtime protocol than appetite-heavy alternatives, Ipamorelin fits that profile.

Not for

Who should avoid it

Not for anyone with active cancer, uncontrolled diabetes, or a physician-directed reason to avoid GH/IGF-1 pathway stimulation. Avoid use alongside other hormone-active compounds unless you are monitoring the full protocol carefully.

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