3,4-DIHYDROXYBENZOIC ACID is graded A (Safe) by Expert·ING, based on COSING regulatory data.

3,4-DIHYDROXYBENZOIC ACID

Protocatechuic Acid

Safety grade: A

Protocatechuic acid is a natural plant-based compound found in many fruits, vegetables, and herbs like green tea and olives. It is a type of antioxidant that helps defend the skin against everyday environmental damage.

This ingredient is used in cosmetic products to help protect the skin from oxidative stress and environmental aggressors, strengthening the skin's natural barrier.

Graded using: COSING.

Last verified: May 26, 2026