SERINE is graded A (Safe) by Expert·ING, based on COSING, FDA regulatory data.

SERINE

Safety grade: A

Serine is an amino acid, which is a building block of proteins found naturally in your body and in many plants. It's a naturally occurring compound that helps keep skin and hair healthy and moisturized.

Serine is used in cosmetics to moisturize and condition skin and hair, reduce frizz and static electricity, and help mask any unpleasant odors in the product.

Graded using: COSING, FDA.

Last verified: May 26, 2026