Onions are super-rich in anti-inflammatory, antioxidant flavonoids - quercetin that guards the bone against free radical damage. It also prevents the bone from breaking down

Onions are low in calories yet high in nutrients, including vitamin C, B vitamins and potassium.

Red onions are rich in anthocyanins, which are powerful plant pigments that may protect against heart disease, certain cancers and diabetes.

A diet rich in allium vegetables like onions may have a protective effect against certain cancers.