Our take
Is Sh-Polypeptide-50 a Good Ingredient?
The Fair rating reflects how preliminary the data still is: real-world efficacy is uncertain, and whatever benefit shows up is likely to be subtle and formula-dependent rather than reliable. Some users also report mild stinging or redness.
What it does
Skin Benefits
Used consistently, it aims to improve softness and give skin a velvety finish. The evidence for this is still preliminary, so any change is likely to be incremental.
Where you'll find it
Uses in Skincare & Cosmetics
It's used in moisturizers, leave-on masks, and makeup-priming lotions to smooth the skin before application.
Before you use it
There are no known ingredient-specific regulatory restrictions, and standard cosmetic use is considered low risk. Minor irritation can happen, particularly on compromised skin, so avoid applying it to broken or freshly exfoliated areas.
Products with Sh-Polypeptide-50