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.
Bioactive peptide fragments derived from hydrolyzed collagen protein. The most commercially successful peptide supplement category, with a global market exceeding $5 billion. Available in Types I, II, III, and marine-sourced variants.
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.
Provides bioavailable proline, glycine, and hydroxyproline — amino acids critical for collagen synthesis. Dipeptides (Pro-Hyp, Hyp-Gly) are absorbed intact and stimulate fibroblast activity, promoting endogenous collagen production in skin, joints, and connective tissue.
- Anti-aging skincare
- Collagen stimulation
- Wrinkle reduction
- Skin firmness
- Scar healing support
- Skin elasticity and hydration
- Joint health and mobility
- Hair and nail strength
- Gut lining support
- Bone density support
- Generally well-tolerated topically
- Rare skin irritation
- Efficacy varies by formulation concentration
- No injectable safety data
- Generally well-tolerated
- Mild GI discomfort in some users
- Allergic reactions (rare, especially marine-sourced)
- Heavy metal contamination risk in low-quality products
- Efficacy debated — some studies industry-funded
Cosmetic ingredient. Not FDA-regulated as a drug. Widely available in skincare products without prescription.
Classified as a dietary supplement under DSHEA. Not FDA-approved for any medical indication. Widely available OTC without prescription. No regulatory restrictions.
- 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.