Cosmetic ingredient dictionary
Threonine in cosmetics: what it is and what it does
Threonine is a cosmetic ingredient that makes hair easier to comb, softer or shinier. Open Beauty Facts finds it in 104 products, most often nail makeup.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Threonine do in a product?
In a cosmetic product, Threonine makes hair easier to comb, softer or shinier, reduces static, so hair stays flat and changes how hair waves or curls. The EU’s CosIng database lists these jobs for it: hair conditioning, antistatic and hair waving or straightening.
What other names and numbers does Threonine have?
- CAS number
- 72-19-5, 80-68-2
- EC number
- 200-774-1, 201-300-6
- CosIng reference
- 38594
Which products contain Threonine?
Open Beauty Facts finds Threonine in the ingredient lists of 104 of the 22,021 products it has a list for, most often nail makeup, nail polishes and hair care.
Products with it, by country of sale: United States 18 · Norway 17 · Germany 12 · Netherlands 10.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Threonine 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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