How we scored it
Where it comes from
Dominant route: solid-phase peptide synthesis from fermentation-derived amino acids, then acylation with petrochemical branched octanoic acid (2-ethylhexanoic or isooctanoic acid). No natural-origin route for the branched acid is commercial.
In plain English
A short chain of four amino acids with a branched eight-carbon fatty acid attached, used to condition skin. The peptide part is built from amino acids that come from fermentation or protein hydrolysis; the fatty acid tail is made from petrochemical feedstock.
CosIng definition: Isooctanoyl Tetrapeptide-25 is the product obtained by the reaction of Tetrapeptide-25 with a branched chain octanoic acid.
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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.
- 2ISOOCTANOYL TETRAPEPTIDE-25. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3ISOOCTANOYL TETRAPEPTIDE-25. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ISOOCTANOYL%20TETRAPEPTIDE-25