How we scored it
Myristoyl C14 chain (coconut/palm kernel) + four amino acids (fermentation or protein hydrolysate) joined by amide bonds; no petrochemical cap: 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
Myristic acid from palm kernel or coconut oil is coupled to a synthesised tetrapeptide of fermentation-derived amino acids. The Tetrapeptide-13 sequence was not supplied, so synthetic residues such as norleucine cannot be fully excluded.
In plain English
A lipid-linked peptide: four amino acids joined to myristic acid, a fatty acid from coconut or palm kernel oil. The fatty tail helps it stay in the skin, and it is used as a skin-conditioning ingredient.
CosIng definition: Myristoyl Tetrapeptide-13 is the reaction product of myristic acid and Tetrapeptide-13
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.
- 2MYRISTOYL TETRAPEPTIDE-13. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3MYRISTOYL TETRAPEPTIDE-13. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=MYRISTOYL%20TETRAPEPTIDE-13