Database/Skin Conditioning/Acetyl Tyrosine
Mostly natural · ISO 16128

Is Acetyl Tyrosine natural?

Mostly. Tyrosine from fermentation or protein hydrolysis is N-acetylated using petrochemical acetic anhydride.

INCI nameAcetyl Tyrosine
CAS537-55-3
FormulaC11H13NO4 · 223.22 Da
FunctionSkin Conditioning · Tanning
FeedstockL-Tyrosine is produced by fermentation or enzymatic conversion,…

How we scored it

Tyrosine C9H11NO3 181.19 Da (fermentation/natural amino acid) + acetyl cap C2H2O 42.04 Da (petrochemical) = 181.19/223.22 = 0.81
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

L-Tyrosine is produced by fermentation or enzymatic conversion, then acetylated with acetic anhydride. Single dominant commercial route.

In plain English

A modified form of the amino acid tyrosine, used to condition skin and support tanning products.

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Structure

2D structure of Acetyl Tyrosine

(2S)-2-acetamido-3-(4-hydroxyphenyl)propanoic acid

PubChem CID 68310 ↗

References

  1. 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.
  2. 2Acetyl Tyrosine. PubChem CID 68310. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
  3. 3ACETYL TYROSINE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
  4. 4ACETYL TYROSINE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=ACETYL%20TYROSINE