CheckVegan

Is Isoleucine vegan?

Isoleucine

Vegan Vegan
Vegetarian Vegetarian

Isoleucine is an essential branched-chain alpha-amino acid used in protein biosynthesis. For cosmetic use it is produced synthetically or via fermentation and used as a skin/hair conditioning agent.

Also known as 2-Amino-3-methylpentanoic acid, 207-139-8, DL-allo-Isoleucine, L-Isoleucine
INCI name Isoleucine
CAS number 73-32-5
EC number 200-798-2
CosIng ID 34662
Last reviewed 4 July 2026

An ingredient is considered vegan if it contains no animal-derived components at any point in its production.

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