Compare peptides
Put two entries side by side — evidence, mechanism, risks, and community claims.
GHK-Cu
Limited
Compounded / restricted
Summary
Naturally occurring copper-binding tripeptide popular for skin remodeling, hair, and regenerative aesthetics.
Categories
Skin & Aesthetic, Healing & Recovery, Longevity
Mechanism
Gene-expression modulation related to wound repair, antioxidant defense, collagen/elastin synthesis, and anti-inflammatory signaling; copper delivery may support enzymatic processes.
Half-life
Short; topical vs injectable kinetics differ
Routes
Topical; Subcutaneous injection
Legal / access
Widely used in cosmetics; injectable medical status varies. Cosmetic topicals are not the same as sterile injectable research products.
Key risks
- Skin irritation topically
- Copper overload theoretical risk with excess systemic use
- Blue-green discoloration of topicals
Common claims
- Better skin quality and firmness
- Hair thickening support
- Systemic recovery and youth-gene narratives
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