Compare Peptides
Select any two compounds for a side-by-side comparison of mechanism, uses, risks, and FDA regulatory status.
Popular comparisons
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.
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.
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.
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.
- Skin elasticity and hydration
- Joint health and mobility
- Hair and nail strength
- Gut lining support
- Bone density support
- Anti-wrinkle topical treatment
- Collagen stimulation in aging skin
- Skin firmness and elasticity improvement
- Post-procedure skin recovery
- Cosmeceutical formulations
- 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
- 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
Classified as a dietary supplement under DSHEA. Not FDA-approved for any medical indication. Widely available OTC without prescription. No regulatory restrictions.
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.
This comparison is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before starting any peptide therapy.