Ingredient or product comparison
Peptides for Skin Aging Compared: Mechanism Comparison
Matrixyl-3000 (palmitoyl tripeptide-1 + tetrapeptide-7) Mimics damaged collagen fragments; binds TGF-beta receptors to upregulate collagen I, III, and glycosaminoglycans Extracellular matrix (dermis) 117% increase in collagen synthesis, 23% wrinkle volume redu
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- Matrixyl-3000 (palmitoyl tripeptide-1 + tetrapeptide-7)
- Mimics damaged collagen fragments; binds TGF-beta receptors to upregulate collagen I, III, and glycosaminoglycans
- Extracellular matrix (dermis)
- 117% increase in collagen synthesis, 23% wrinkle volume reduction at 60 days (3% concentration)
- 578 Da
- 3–5%
- Best for structural collagen rebuilding and long-term firmness. Requires 8–12 weeks for visible results
- Argireline (acetyl hexapeptide-8)
- Inhibits SNARE complex formation; reduces acetylcholine release at neuromuscular junctions
- Neuromuscular signaling (dynamic wrinkles)
- 30% wrinkle depth reduction at 30 days (10% concentration); 27% vs 48% for Botox in split-face trial
- 889 Da
- 5–10%
- Best for expression lines (forehead, crow's feet, glabellar). Does not address static wrinkles or volume loss
- Copper GHK-Cu (glycyl-L-histidyl-L-lysine copper)
- Delivers copper ions for lysyl oxidase cofactor; activates 4,000+ tissue remodeling genes; reduces MMPs
- Enzymatic collagen cross-linking, anti-inflammatory pathways
- 17.2% skin density increase, 31.2% fine line reduction at 12 weeks (1% concentration)
- 340 Da
- 1–3%
- Best for oxidative stress, inflammation, and rapid texture improvement. Addresses multiple aging pathways simultaneously