Quercetin
What is Quercetin?
Quercetin is a naturally occurring flavonol, a type of flavonoid compound abundant in plant sources like onions, apples, berries, and capers. Chemically, it features a structure with multiple hydroxyl groups enabling strong free radical scavenging. In cosmetics, it falls under functional ingredients, primarily incorporated into serums, creams, and masks targeting aging or environmental stress. It operates by donating electrons to neutralize reactive oxygen species, preventing lipid peroxidation in skin cell membranes and formulation oils. This stabilizes sensitive components, extending product stability. As a skin conditioner, it interacts with lipids and proteins to promote hydration retention and barrier integrity, fostering a supple feel without greasiness. Typically used at trace levels due to potency, it suits clean beauty formulations seeking botanical efficacy.
Roles in Formulation
This ingredient serves the following purposes in cosmetic formulations:
Benefits
Helps protect skin lipids from oxidation caused by environmental factors.
Supports maintenance of skin's smooth and flexible texture.
Contributes to product stability by slowing degradation of oils and actives.
Who It's For
A quick guide for who this ingredient may suit (and who should be cautious).
| Who May Benefit | Who Should Avoid |
|---|---|
| Individuals exposed to urban pollution or sun seeking oxidative support. | Those with known allergies to flavonoids or specific plants like onions. |
| People with normal to dry skin desiring added conditioning. | Individuals with highly reactive skin prone to botanical sensitivities. |
| Users preferring plant-derived antioxidants in daily routines. | People using prescription topicals without patch testing first. |
Safety Notes
- Rated low hazard by EWG with scores of 1 across assessments.
- Non-comedogenic at rating 0, unlikely to clog pores.
Frequently Asked Questions about Quercetin
What is quercetin in skincare?
A plant flavonoid acting as an antioxidant and skin conditioner to protect and soften.
Is quercetin safe for daily use?
Generally low risk per safety databases, suitable for most in formulated products.
Does quercetin cause breakouts?
Rated 0 comedogenic, minimal pore-clogging potential.