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Best Peptides for Wound Scars: Mechanism Comparison
GHK-Cu (Copper Peptide) Activates lysyl oxidase to cross-link collagen; downregulates IL-6 and TNF-α inflammatory cytokines Topical (penetrates at 340 Daltons) or microneedling Atrophic scars, mature scars needing remodeling High. Multiple RCTs showing 30–42%
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- GHK-Cu (Copper Peptide)
- Activates lysyl oxidase to cross-link collagen; downregulates IL-6 and TNF-α inflammatory cytokines
- Topical (penetrates at 340 Daltons) or microneedling
- Atrophic scars, mature scars needing remodeling
- High. Multiple RCTs showing 30–42% texture improvement
- Most versatile. Works on existing scars and during active healing
- BPC-157
- Stimulates fibroblast migration via FAK-paxillin pathway; upregulates VEGF for angiogenesis
- Subcutaneous injection near wound site
- Fresh wounds (0–14 days post-injury) to minimize scarring
- Moderate. Strong animal data, limited human trials
- Best for prevention during healing. Minimal effect on mature scars
- Matrixyl-3000
- Signals procollagen synthesis through TGF-β receptors; inhibits IL-6 to reduce inflammation
- Topical at 3–5% or with microneedling
- Hypertrophic scars, pigmented scars
- Moderate. Clinical trials show 23–38% improvement in volume and pigmentation
- Effective for raised scars but requires consistent use over 12+ weeks