A type of flavonoid compound with specific chemical structure, found in plants and known for its antioxidant properties.
From 'flavone' combined with '-ol,' a suffix indicating the presence of a hydroxyl group (a chemical structure containing oxygen and hydrogen). These compounds are flavonoids with this particular chemical arrangement.
Quercetin, one of the most studied flavonols, is what makes red onions red and is found in apple skins—it's so common that you've probably eaten tons of it without knowing this specific name for what makes it chemically special.
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