Tripeptide-51
A cosmetic ingredient used as antimicrobial, antioxidant, astringent in skincare, haircare, and personal-care products sold in the European Union.
What is it?
Tripeptide-51 is the synthetic peptide consisting of alanine, glycine, and hydroxyproline.
What does it do?
Tripeptide-51 is listed in the EU cosmetic ingredient inventory with the following declared functions:
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Antimicrobial
kills or inhibits the growth of microorganisms
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Antioxidant
neutralises free radicals to slow oxidative damage to the formulation or skin
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Astringent
tightens or contracts skin tissue and pores, often used in toners and after-shave products
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Humectant
draws moisture from the air or deeper skin layers to the surface, helping skin retain water
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Skin conditioning
improves the appearance, feel, and condition of skin
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Skin protecting
helps shield skin from external environmental factors
EU regulatory status
Tripeptide-51 is allowed for use in cosmetic products in the European Union under Regulation 1223/2009. It is not subject to a specific Annex restriction at the time of writing.
Frequently asked questions
What is Tripeptide-51?
Tripeptide-51 is a cosmetic ingredient catalogued in the EU CosIng database. Tripeptide-51 is the synthetic peptide consisting of alanine, glycine, and hydroxyproline.
Is Tripeptide-51 allowed in cosmetics in the EU?
Yes. Tripeptide-51 is allowed for use in cosmetic products in the EU under Regulation 1223/2009.
What does Tripeptide-51 do in cosmetic products?
Tripeptide-51 is declared in the EU cosmetic ingredient inventory with these functions: antimicrobial, antioxidant, astringent, humectant, skin conditioning, skin protecting.
Related ingredients
Source: EU CosIng database (European Commission). This page is derived from public-sector information published by the European Commission. · Last updated: 28/11/2014