Category: Nutrients

Among the polyphenol phytochemicals found in blueberries, broccoli, onions, and green tea is the flavonoid quercetin (Li et al., 2021).  Quercetin is also found in apples and grapes (Gugliandolo et al., 2020).  Sanver et al. describe the structure of quercetin in a peer-reviewed primary article; they found that the different structures of different types of…