Cosmetic ingredient dictionary
Cystine in cosmetics: what it is and what it does
Cystine is a cosmetic ingredient that makes hair easier to comb, softer or shinier. Open Beauty Facts finds it in 14 products, most often body care.
By Bravoora teamUpdated Sources checked 2 sourcesHow we check
What does Cystine do in a product?
In a cosmetic product, Cystine makes hair easier to comb, softer or shinier, hides an unwanted smell or taste and reduces static, so hair stays flat. The EU’s CosIng database lists these jobs for it: hair conditioning, masking and antistatic.
What other names and numbers does Cystine have?
- CAS number
- 56-89-3
- EC number
- 200-296-3
- CosIng reference
- 75424
Which products contain Cystine?
Open Beauty Facts finds Cystine in the ingredient lists of 14 of the 22,021 products it has a list for, most often body care, body milks and skincare.
Products with it, by country of sale: Australia 7 · Turkey 4 · France 1 · India 1.
Counted on 13 October 2026 from Open Beauty Facts, which volunteers fill from real packs: it shows where Cystine 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
Create a website profile with the things you avoid and the people you check for.
Build my profileSave and edit your profile on this website. App transfer is not available yet.