How we scored it
Pentapeptide + cysteine amide, all amino-acid fragments; cysteine sulfur is amino-acid sulfur, not a synthetic thiol; coupling agents leave no mass; C-terminal amide counted natural: 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
Dominant route: peptide synthesis from fermentation-derived amino acids, then coupling with cysteine (as cysteinamide). No alternative route is commercially significant.
In plain English
A short peptide of five amino acids linked to cysteine amide, used in hair conditioning. It is assembled in the lab from amino acids that come from fermentation or protein hydrolysis.
CosIng definition: Pentapeptide-30 Cysteinamide is the product obtained by the reaction of Pentapeptide-30 and Cysteine.
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.
- 2PENTAPEPTIDE-30 CYSTEINAMIDE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3PENTAPEPTIDE-30 CYSTEINAMIDE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=PENTAPEPTIDE-30%20CYSTEINAMIDE