Theanine
Theanine is a cosmetic ingredient used as a skin conditioning - emollient, humectant agent. It is used in 29 products in our dataset. It is regulated in the EU (listed in a Cosmetics Regulation annex). PubMed carries 19 studies of its skin or topical use.
| INCI name | THEANINE |
| Function | SKIN CONDITIONING - EMOLLIENT, HUMECTANT, SKIN CONDITIONING |
| CAS number | 3081-61-6 |
| EC number | 221-379-0 |
| Prevalence | 29 products (0.03% of dataset) |
| Most used in | Skincare |
| EU status | Restricted (annex ) |
| Scientific studies | 19 on PubMed (skin/cosmetic/topical) |
| Monthly searches | 22,200 |
Used in
Toners 17.2%General Moisturizers 10.3%Conditioners 6.9%Emulsions 6.9%Essences 6.9%Face Cleansers 6.9%
Frequently asked
- What does Theanine do in skincare?
- Theanine functions as a skin conditioning - emollient, humectant agent in cosmetic formulas.
- Is Theanine allowed in cosmetics?
- Yes, but it is regulated in the EU — it appears in a Cosmetics Regulation annex with usage conditions.
- What products contain Theanine?
- It is most commonly found in Skincare products, especially toners (17.2% of its uses).
Manufacturers with experience using Theanine
Match with vetted US contract manufacturers that have hands-on experience formulating with this ingredient.