How we scored it
Chain of natural amino acids (alanine, lysine, phenylalanine per CosIng); no acyl cap named in the INCI; resin, protecting groups and coupling agents leave no mass. All mass n=1, so 1 / 1 = 1.0.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.
Where it comes from
Made by peptide synthesis from amino acids that are produced by fermentation or protein hydrolysis. The CosIng entry gives only the amino acid composition, not the full sequence or any end groups.
In plain English
A short chain of ten amino acids (the building blocks of protein), used in skincare for its skin-conditioning role. It is assembled in a laboratory by linking amino acids, which come from fermentation or protein breakdown.
CosIng definition: Decapeptide-1 is a synthetic peptide composed of alanine, lysine and phenylalanine
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2DECAPEPTIDE-1. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3DECAPEPTIDE-1. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=DECAPEPTIDE-1