Protein 1.2 g, Fat 0.1 g, Minerals 0.4 g, Fiber 0.6 g, Carbohydrates 11.1 g, Energy 50.0 k cal, Calcium 46.9 mg, Phosphorus 50.6 mg, Iron0.6 mg, Thiamin 0.08 mg, Riboflavin 0.01 mg, Niacin 0.4 mg, Folic acid (Total) 6.0 mg, Magnesium 16.0 mg, Sodium 4.0 mg.
Big onions are rich in quercetin, an antioxidant that helps delay oxidative damage to cells and tissue. This compound also helps eradicate free radicals in the body to inhibit low-density lipoprotein oxidation. Studies also reveal that onions may help prevent gastric ulcers. Onions contain phytochemicals known as disulfides which demonstrate a variety of health-functional properties, including anticancer and antimicrobial activities.