3-ASCORBYL CARBONYL DIPEPTIDE-17 is graded A (Safe) by Expert·ING, based on COSING regulatory data.

3-ASCORBYL CARBONYL DIPEPTIDE-17

Safety grade: A

This is a specialized lab-created compound that combines Vitamin C with two amino acids (the building blocks of protein) to help it work more effectively on skin. The combination helps deliver skin-brightening and nourishing benefits in a more stable form than regular Vitamin C.

This ingredient is used in cosmetic products to condition and improve the overall appearance and feel of skin, helping to keep it soft, smooth, and healthy-looking.

Graded using: COSING.

Last verified: May 26, 2026