
SKU: TM20102509
Quercetin
Usage Rate: Typical: use the supplied liquid active concentrate at supplier-recommended levels in leave-on formulas, delivering approximately 0.1–0.5% pure active in the finished product (1000–5000 ppm).
Packaging
Liquid sizes — 0.33 oz (10 mL) sample through bulk (US · metric)
Description
What it is
Quercetin is a flavonoid found in many plants, including onions, apples and tea. This listing is a liquid quercetin ingredient for topical cosmetic products. The exact INCI, carrier and quercetin content are stated on the CoA for each lot.
Find it with our cosmetic actives. Related flavonoid actives include rutin, and ferulic acid is a common antioxidant partner in day creams.
Cosmetic role
In skincare, quercetin is used as an antioxidant ingredient that helps protect the formula and the look of the skin from everyday environmental stress. Products with it are usually described as soothing-looking, fresher and more even in tone, and it suits eye-area products positioned for a less puffy look.
Where it is used
The supplier specification lists creams and milks for all skin types, face lotions, products for mature skin, balms, scrubs and face masks. It also fits leave-on serums and personal care products.
How to work with it
Add the liquid to the water phase during cool-down, below about 40 °C, and avoid long heating. Keep the finished pH mild and preserve the formula well. Flavonoids can add a light yellow tint, so check color stability over time. Use the level given on the CoA for your lot.
Storage
Store tightly closed in a cool, dry place away from light and heat.
Product Specifications
TDS / CoA available on request. Contact us
Frequently Asked Questions
What is quercetin?
A plant flavonoid used in cosmetics as an antioxidant ingredient.
Which products is it for?
Creams, face lotions, balms, scrubs, face masks and products for mature skin.
When do I add it?
Add it to the water phase during cool-down, below about 40 °C.



