Red onions are cultivars of the onion with purplish-red skin and white flesh tinged with red. These onions tend to be medium to large in size and have a mild to sweet flavor. They are often consumed raw, grilled or lightly cooked with other foods, or added as a decoration to salads.
Both onions provide about 10% of the daily value for vitamin C, but red contains a higher amount of antioxidant compounds. Red Onions also have antibacterial properties, may boost bone density, help control blood sugar and improve digestive health.