Onion

Small description

Onions are an excellent source of antioxidants and contain at least 17 types of flavonoids. Red onions, in particular, contain anthocyanins, plant pigments in the flavonoid family that give red onions their deep color. These may protect against diabetes and certain types of cancer.

All types of onions are good for you, but this dark reddish-purple variety, sometimes called purple onion, has especially high levels of quercetin and other helpful plant compounds known as flavonoids. Flavonoids give many fruits, vegetables, and flowers their colors.