GHRP-2 Guide

GHRP-2 (Growth Hormone Releasing Peptide-2) is a synthetic hexapeptide and one of the first GHRP compounds developed for research. It works by binding to the ghrelin receptor (GHSR-1a) in the pituitary, stimulating a robust pulse of endogenous growth hormone release. This mechanism is distinct from GHRH analogs like CJC-1295, which amplify the signal rather than trigger it directly.

Compared to GHRP-6, GHRP-2 has a weaker ghrelin-mimicking effect on the stomach — meaning it causes significantly less hunger while still producing a strong GH pulse. Compared to Ipamorelin, GHRP-2 delivers a broader GH effect but also elevates cortisol and prolactin at higher doses, which some users may wish to monitor.

With a short half-life of approximately 30 minutes, GHRP-2 requires three injections per day to maintain sustained GH elevation — a key protocol consideration when tracking your regimen with Shotlee.

GHRP-2's short half-life (~30 minutes) means a single injection produces a GH pulse that decays quickly. To maintain meaningful IGF-1 elevation, three injections per day is the standard research protocol. Each injection should be made subcutaneously (SQ) into the abdomen, ideally at least 30 minutes away from meals to avoid insulin blunting the GH response.

Inject fasted, before breakfast. Wait 30+ minutes before eating to preserve the GH pulse. This coincides with the cortisol awakening response — keep doses conservative if cortisol sensitivity is a concern.

Best timed post-workout on training days (when GH signaling complements recovery) or 2–3 hours after lunch on rest days. Avoid injecting immediately post-meal.

30–60 minutes before bed, on an empty stomach. Amplifies the natural nocturnal GH pulse during deep sleep stages — widely considered the most important injection of the day for recovery and body composition effects.

Injection Timing: Inject fasted, before breakfast. Wait 30+ minutes before eating to preserve the GH pulse. This coincides with the cortisol awakening response — keep doses conservative if cortisol sensitivity is a concern. Best timed post-workout on training days (when GH signaling complements recovery) or 2–3 hours after lunch on rest days. Avoid injecting immediately post-meal. 30–60 minutes before bed, on an empty stomach. Amplifies the natural nocturnal GH pulse during deep sleep stages — widely considered the most important injection of the day for recovery and body composition effects.

The most common and well-documented GHRP-2 stack pairs it with CJC-1295 (no DAC), a GHRH analog. GHRPs like GHRP-2 trigger GH release; GHRH analogs like CJC-1295 amplify and extend the amplitude of that pulse. Together, they act on two distinct pathways and produce a synergistic GH response that is significantly larger than either alone.

A common stack: 100–200mcg CJC-1295 (no DAC) + 100–200mcg GHRP-2, co-injected subcutaneously 2–3 times daily. This combination is frequently used for anti-aging GH support, fat loss, muscle preservation, and improved sleep quality. Shotlee lets you log both peptides in a single injection record to track your full stack.