3. Better Cardiovascular Health
Onions are high in an antioxidant called quercetin, which like all antioxidants, benefits health by neutralizing free radicals that otherwise cause cellular damage. But quercetin is special in that it keeps arteries soft and elastic.
It also plays a role in regulating blood pressure and lowers the level of LDL cholesterol in people at risk for cardiovascular disorders. Eating some onion every day, therefore, supports cardiovascular health and minimizes the risk of heart disease.