HYDROXYPROPYLTRIMONIUM LEMON PROTEIN is graded A (Safe) by Expert·ING, based on COSING regulatory data.

HYDROXYPROPYLTRIMONIUM LEMON PROTEIN

Safety grade: A

This is a processed protein derived from lemon that has been chemically modified to help hair and skin hold onto moisture. It's created by taking lemon proteins and adding special chemical groups to make them more effective at binding water.

As a humectant, this ingredient attracts and holds water in the skin or hair, helping to keep it hydrated and plump while improving moisture retention.

Graded using: COSING.

Last verified: May 26, 2026