Compare Peptides
Select any two compounds for a side-by-side comparison of mechanism, uses, risks, and FDA regulatory status.
Popular comparisons
A lipopeptide consisting of palmitic acid linked to the GHK tripeptide sequence. Designed for topical use to stimulate collagen synthesis and skin repair. Often combined with Palmitoyl Tetrapeptide-7 in the commercial product Matrixyl 3000.
A lipopeptide used in topical skincare that stimulates collagen and fibronectin production in the skin. One of the most studied cosmetic peptides, marketed as Matrixyl. Works by mimicking a collagen fragment that signals fibroblasts to produce new collagen matrix. Widely used in anti-aging serums and creams.
Mimics the skin's natural collagen-fragment signaling. When collagen breaks down, GHK fragments signal fibroblasts to produce new collagen. Palmitoyl Tripeptide-1 amplifies this signal, promoting collagen I, III, and IV synthesis. The palmitic acid tail enhances skin penetration.
The KTTKS sequence mimics a collagen breakdown fragment (matrikine) that signals fibroblasts to initiate new collagen synthesis. The palmitoyl group enhances skin penetration by increasing lipophilicity. Stimulates production of collagen types I, III, and IV, as well as fibronectin and glycosaminoglycans.
- Anti-aging skincare
- Collagen stimulation
- Wrinkle reduction
- Skin firmness
- Scar healing support
- Anti-wrinkle topical treatment
- Collagen stimulation in aging skin
- Skin firmness and elasticity improvement
- Post-procedure skin recovery
- Cosmeceutical formulations
- Generally well-tolerated topically
- Rare skin irritation
- Efficacy varies by formulation concentration
- No injectable safety data
- Generally well-tolerated topically
- Mild skin irritation in sensitive individuals
- Efficacy depends on formulation and concentration
- Not effective via injection — topical only
- Results require consistent use over weeks
Cosmetic ingredient. Not FDA-regulated as a drug. Widely available in skincare products without prescription.
Not regulated as a drug by the FDA. Classified as a cosmetic ingredient. No prescription required. Available in over-the-counter skincare products. No FDA review process for cosmetic peptides.
- Topical peptides as cosmeceuticals
2018 · PubMed
This comparison is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any peptide therapy.