Cosmetic ingredient dictionary
Isoleucine in cosmetics: what it is and what it does
Isoleucine is a cosmetic ingredient that keeps the skin in good condition. Open Beauty Facts finds it in 60 products, most often hair care.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Isoleucine do in a product?
In a cosmetic product, Isoleucine keeps the skin in good condition, makes hair easier to comb, softer or shinier and reduces static, so hair stays flat. The EU’s CosIng database lists these jobs for it: skin conditioning, hair conditioning and antistatic.
What other names and numbers does Isoleucine have?
- CAS number
- 73-32-5, 443-79-8
- EC number
- 200-798-2, 207-139-8
- CosIng reference
- 34662
Which products contain Isoleucine?
Open Beauty Facts finds Isoleucine in the ingredient lists of 60 of the 22,021 products it has a list for, most often hair care, skincare and shampoos.
Products with it, by country of sale: United States 12 · Germany 10 · Turkey 8 · France 6.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Isoleucine turns up, not how much of the market it is.
Bravoora reads this ingredient for everyone you shop for: an allergy or intolerance, a vegan or vegetarian diet, a calorie or protein goal, and the labels on supplements and skincare too. Build a profile · For dermatologists, dietitians and doctors
Sources
The job, the description and the EU annex entry are CosIng’s; the fragrance allergens are the EU Annex III names Bravoora’s label checker reads; the product counts are Open Beauty Facts’.
- European Commission: CosIng cosmetic ingredient database (functions, description, EU annex entry)
- Open Beauty Facts: product database, 77,506 products, read 13 October 2026, ODbL
Contains information from Open Beauty Facts, which is made available here under the Open Database License (ODbL). Read the licence · Download this dictionary’s data · How we check
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