ACETYL D-LEUCYL D-SERINYL D-SERINYL D-PHENYLALANINE is graded A (Safe) by Expert·ING, based on COSING regulatory data.

ACETYL D-LEUCYL D-SERINYL D-SERINYL D-PHENYLALANINE

Safety grade: A

This is a lab-created compound made from amino acids, the building blocks of proteins. It's used in skincare products to help improve skin texture and firmness by supporting the skin's natural structure. It works gently to enhance the appearance of fine lines and overall skin quality.

Graded using: COSING.

Last verified: June 9, 2026