Tetrapeptide-21
Tetrapeptide-21 is a cosmetic ingredient used as a skin conditioning agent. It is used in 40 products in our dataset. It is regulated in the EU (listed in a Cosmetics Regulation annex).
| INCI name | TETRAPEPTIDE-21 |
| Function | SKIN CONDITIONING |
| CAS number | - |
| Prevalence | 40 products (0.04% of dataset) |
| Most used in | Skincare |
| EU status | Restricted (annex ) |
| Monthly searches | 140 |
Used in
Serums 45%General Moisturizers 25%Eye Moisturizers 10%Toners 5%Face Cleansers 2.5%Facial Treatments 2.5%
Frequently asked
- What does Tetrapeptide-21 do in skincare?
- Tetrapeptide-21 functions as a skin conditioning agent in cosmetic formulas.
- Is Tetrapeptide-21 allowed in cosmetics?
- Yes, but it is regulated in the EU — it appears in a Cosmetics Regulation annex with usage conditions.
- What products contain Tetrapeptide-21?
- It is most commonly found in Skincare products, especially serums (45% of its uses).
Manufacturers with experience using Tetrapeptide-21
Match with vetted US contract manufacturers that have hands-on experience formulating with this ingredient.