Ingredient or product comparison

Best Peptides to Stop Hair Loss Ranked: Clinical Evidence Comparison

| Peptide Compound | Primary Mechanism | Molecular Weight (Da) | Phase 2 Trial Evidence | Anagen Increase (%) | Typical Response Time | Professional Assessment ||—|—|—|—|—|—|| GHK-Cu (Copper Peptide) | Wnt/beta-catenin activation, collagen XVII upregulation |

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| Peptide Compound | Primary Mechanism | Molecular Weight (Da) | Phase 2 Trial Evidence | Anagen Increase (%) | Typical Response Time | Professional Assessment ||—|—|—|—|—|—|| GHK-Cu (Copper Peptide) | Wnt/beta-catenin activation, collagen XVII upregulation | 340 | Yes. 12-week RCT, n=40 | 19–31% | 90–120 days | Strongest evidence for follicle reactivation in androgenetic alopecia; requires daily application || Thymosin Beta-4 | VEGF secretion, endothelial migration, angiogenesis | 4963 | Yes. 16-week pilot, n=30 | 15–22% | 120–150 days | Effective for telogen effluvium and chronic shedding; high MW limits absorption without microneedling || Copper Tripeptide-1 | 5-alpha reductase inhibition at follicle, localised DHT reduction | 340 | Yes. 24-week RCT, n=87 | 12–18% | 90–120 days | Comparable to low-dose finasteride without systemic side effects; synergistic with minoxidil || CG-KERAMIN2 (KGF Analog) | Keratinocyte proliferation via MAPK/ERK pathway | 1150 | Yes. 24-week RCT, n=87 | 2