Quercetin is a flavonoid present in many fruits, vegetables, and grains, recognized for its antioxidant and anti-inflammatory properties. Studies have explored the possibility of this nutrient ...

However, the study focused on a flavonol called quercetin. Quercetin is a natural pigment with antioxidant properties that ...

The compound is an antioxidant or flavanol called quercetin. Cabernets from the sunny Napa Valley contain high levels of it, they say. Red grapes make more quercetin when they are exposed to sunshine.