GHK-Cu vs Somatropin (HGH)
Side-by-side comparison of key properties, dosing, and research.
Skin & CosmeticRecovery & RepairAnti-Aging & Longevity
GHK-CuGrowth Hormone PeptidesAnti-Aging & Longevity
Somatropin (HGH)- Summary
- GHK-Cu is a naturally occurring copper complex that declines with age. It is one of the most studied anti-aging peptides, known for powerful skin rejuvenation, wound healing, and tissue remodeling effects.
- Somatropin is recombinant human growth hormone (rhGH), identical in structure to the 191-amino acid pituitary-derived growth hormone. It is FDA-approved for growth hormone deficiency, short stature, and wasting conditions. Off-label, it is widely explored for body composition, anti-aging, and performance enhancement, though significant risks accompany unsupervised use.
- Half-Life
- 2–4 hours
- 2-3 hours (subcutaneous); 20-30 minutes (intravenous)
- Admin Route
- SubQ, Topical
- Subcutaneous, Intramuscular (less common)
- Research
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- Typical Dose
- 1–3 mg
- 0.15-0.3 mg/day (adults); titrated to IGF-1 levels
- Frequency
- 3–5 times per week
- Once daily
- Key Benefits
- Reduces wrinkles and fine lines
- Improves skin firmness and elasticity
- Accelerates wound healing
- Reduces inflammation and oxidative damage
- Promotes hair growth and thickness
- Supports collagen and elastin production
- May improve overall skin health and appearance
- Resets aged fibroblast behavior
- Anti-fibrotic — reduces scar tissue formation
- Increases lean muscle mass and reduces body fat (particularly visceral)
- Restores growth hormone deficiency (FDA-approved)
- Improves bone mineral density
- Enhances exercise capacity and recovery
- Supports skin thickness and collagen synthesis
- Improves lipid profile in GHD patients
- Explored for anti-aging and cellular regeneration
- Side Effects
- Temporary blue-green discoloration at injection site (from copper — harmless)
- Post-injection sting (brief)
- Skin irritation with topical use (rare)
- Fluid retention and edema (common, dose-dependent)
- Carpal tunnel syndrome
- Joint and muscle pain
- Insulin resistance and elevated blood glucose
- +3 more
- Stacks With
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