GHRP-6
Also known as: Growth Hormone Releasing Hexapeptide, GHRP6, GH-Releasing Peptide-6
Growth Hormone Releasing Peptide-6 | Hexapeptide GHS
Overview
GHRP-6 is a synthetic growth hormone secretagogue that stimulates the pituitary gland to release growth hormone. It was one of the first GHRPs developed and works by binding to the ghrelin receptor (GHS-R1a). Unlike direct HGH injections, GHRP-6 enhances the body's natural GH production while keeping negative feedback mechanisms balanced. It is known for its potent appetite-stimulating effects.
Key benefits
- Potent stimulation of natural growth hormone release
- Significant increase in appetite (beneficial for bulking/weight gain)
- Enhanced muscle growth through elevated GH and IGF-1
- Improved fat metabolism and body composition
- Cardioprotective effects observed in research
- Enhanced recovery from exercise and injury
- Cytoprotective and anti-inflammatory properties
- Maintains natural GH pulsatile release
Mechanism of action
GHRP-6 binds to the growth hormone secretagogue receptor (GHS-R1a), the same receptor activated by ghrelin. This initiates a signaling cascade in the hypothalamus and pituitary gland, triggering a rapid pulse of natural GH secretion. The released GH then signals the liver to secrete IGF-1, which promotes muscle growth and fat metabolism. GHRP-6 also stimulates ghrelin release, causing significant appetite increase.
Molecular data
- Type
- Synthetic hexapeptide
- Half-life
- 15-60 minutes
Sequence
His-D-Trp-Ala-Trp-D-Phe-Lys-NH2
Indications
What the research community uses this compound for, with self-reported effectiveness.
Growth Hormone Enhancement
Body Composition
Protective Effects
Dosing protocols
Common protocols by delivery method. Adjust the curve below to model accumulation in your own cycle.
Delivery method
| Protocol | Dose | Frequency | Duration |
|---|---|---|---|
| — | 100 mcg | 2-3x daily | — |
| — | 200-300 mcg | 2-3x daily | — |
| — | 100 mcg each | 2-3x daily | — |
| — | 100-200 mcg | Before meals | — |
Safety
Reported adverse effects, contraindications, and what to monitor on cycle.
Common side effects
- Intense hunger/increased appetite (most notable side effect)
- Water retention
- Tingling or numbness in extremities
- Tiredness or lethargy after injection
- Mild headache
Rare side effects
- Elevated cortisol (with high doses)
- Elevated prolactin (with high doses)
- Potential effects on glucose metabolism
Contraindications
- Active cancer or history of cancer
- Pregnancy or breastfeeding
- Pituitary disorders
- Diabetes (use with caution)
- WADA prohibited for competitive athletes