ISOQUERCETIN is graded A (Safe) by Expert·ING, based on COSING regulatory data.
ISOQUERCETIN
Safety grade: A
Isoquercetin is a plant-derived compound that belongs to a group of natural substances called flavonoids, which are known for their protective properties. It's created by chemically modifying quercetin, a compound found in plants like apples and onions, to make it easier for skin to absorb.
This ingredient protects the skin from environmental damage and premature aging by neutralizing harmful free radicals that can break down skin cells.
Graded using: COSING.
Last verified: May 26, 2026
Other Antioxidant ingredients
- TOCOPHEROL — Grade A
- TOCOPHERYL ACETATE — Grade A
- BHT — Grade C**
- ASCORBYL PALMITATE — Grade A
- HYDROXYACETOPHENONE — Grade A
- PENTAERYTHRITYL TETRA-DI-T-BUTYL HYDROXYHYDROCINNAMATE — Grade A
- ASCORBIC ACID — Grade A
- CAMELLIA SINENSIS LEAF EXTRACT — Grade A