How we scored it
Synthetic peptide of alanine, glycine, serine; all amino-acid fragments, condensation water not petroleum mass → 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
Built by solid-phase synthesis from fermentation-derived amino acids (alanine, glycine, serine). No petrochemical building blocks are involved.
In plain English
A short lab-made chain of three amino acids used to condition skin. The amino acids themselves are produced by fermentation, the same process used in food production.
CosIng definition: Tetrapeptide-51 is the synthetic peptide consisting of alanine, glycine and serine.
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.
- 2TETRAPEPTIDE-51. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 3TETRAPEPTIDE-51. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=TETRAPEPTIDE-51