A plant flavonoid used as an antioxidant and skin-conditioning ingredient.
What it is
Quercetin is 3,3',4',5,7-pentahydroxyflavone, a yellow flavonol that occurs widely in plants, for example in onions, apples and tea. CosIng lists it as an antioxidant and skin-conditioning agent.
Where it is used
Found in serums, creams and other skin care products.
Limits of interpretation
The INCI list shows which ingredients are present, not how much of each. Above 1%, ingredients are listed in descending order of weight; below 1% the order is free.
The INCI name does not show whether it was isolated from plants or made synthetically.
Functions
- Antioxidant
- Inhibiting reactions promoted by oxygen, thus avoiding oxidation and rancidity.
- Skin conditioning – miscellaneous
- Enhancing the appearance of dry and/or damaged skin by reducing flaking and restoring suppleness.
EU regulation
This ingredient is not listed in the annexes of Regulation (EC) No 1223/2009 in the CosIng data.