Side Effects
GHRP-6's side effect profile is more pronounced than newer, more selective GHRPs like ipamorelin, though most effects are dose-dependent and transient.
Common:
- Intense hunger and appetite stimulation (onset within 15 to 20 minutes of injection, lasting 30 to 60 minutes). This is the most frequently reported effect and is inherent to GHRP-6's mechanism
- Mild water retention and peripheral edema, particularly during the first 2 to 4 weeks
- Transient flushing, warmth, or dizziness immediately post-injection
- Injection site reactions (redness, minor swelling)
Less Common:
- Tingling or numbness in the extremities (hands and feet), related to GH-mediated fluid shifts
- Head rush or lightheadedness shortly after administration
- Drowsiness, particularly with evening doses
Dose-Dependent (above saturation dose):
- Elevated cortisol via ACTH stimulation. Chronic elevation can impair fat loss, disrupt sleep, and suppress immune function
- Elevated prolactin. In sensitive individuals, sustained elevation may cause gynecomastia or reproductive effects
- These hormonal effects are generally not observed at doses of 100 mcg or below
Theoretical/Long-Term:
- Potential effects on glucose metabolism and insulin sensitivity with prolonged use
- As with all GH-elevating compounds, theoretical concern regarding promotion of growth in undiagnosed malignancies
Water retention and tingling typically diminish within the first few weeks as the body adapts. Starting at a lower dose and titrating upward can minimize initial discomfort.