Another popular food used for seasoning is the onion. Onion is full of flavonoids, particularly quercetin. Flavonoids are natural chemicals that prevent the deposit of fatty material in blood vessels and add pigmentation (color) to plants. Quercetin is a powerful antioxidant that is believed to help reduce heart disease and protect against many forms of cancer. It also has anti-inflammatory properties.
Low in potassium, onions are not only kidney-friendly; they also contain chromium, a mineral that assists your body with the metabolism of fats, proteins and carbohydrates.
Onions can be enjoyed raw or cooked in a variety dishes.