GHK-Cu vs Hexarelin
Well Studied vs Well Studied
synergistic Mechanism-based · 47% GHK-Cu and Hexarelin work through complementary pathways. Growth hormone signaling supports tissue repair processes. A well-established combination in recovery protocols.
Molecular Data
GHK-Cu Hexarelin
Weight 404.96 Da 887 Da
Half-life 0.5-2 hours 1-2 hours
Chain 3 amino acids 6 amino acids
Type Copper tripeptide Synthetic hexapeptide
Key Benefits
GHK-Cu
01 Enhanced collagen production (70% increase in type I and III)
02 Improved skin elasticity
03 Reduced fine lines and wrinkles
04 Accelerated wound healing
05 Hair growth stimulation
06 Antioxidant protection
Hexarelin
01 Most potent GHRP for GH stimulation
02 Powerful synergy with GHRH peptides
03 Cardioprotective effects via CD36 receptor
04 Enhanced muscle growth and strength
05 Improved fat metabolism
06 Better recovery and tissue repair
07 Maintains natural GH pulsatility
08 Stable against proteolytic enzymes
Dosing Protocols
GHK-Cu
0.5-2% topical or 1-3mg injectable / 1-2x daily
Systemic anti-aging 1-2mg 1x daily
Enhanced regeneration 2-3mg 1-2x daily
Hexarelin
100-200 mcg per injection / 2-3 times daily for optimal GH pulses
GH optimization 100 mcg 2-3x daily
Enhanced results 200 mcg 2-3x daily
With GHRH (synergy) 100 mcg each 2-3x daily
Cardioprotection 100-200 mcg 1-2x daily
Side Effects
GHK-Cu
Mild skin irritation initially (usually resolves)
Increased photosensitivity
Hexarelin
Increased appetite (less than GHRP-6)
Water retention
Tingling or numbness
Tiredness after injection
Mild headache
Contraindications
Known copper sensitivity or Wilson's disease
Active skin infections at application site
Pregnancy or breastfeeding (injectable)
Active cancer or history of cancer
Pregnancy or breastfeeding
Pituitary disorders
WADA prohibited for competitive athletes
Research Evidence
GHK-Cu Hexarelin
Status Well Studied Well Studied
References 5 studies 4 studies
Latest July 2025 —
FDA Approved No No
This comparison is for educational and research purposes only. Consult a healthcare professional before use.