Onion lowers cholesterol, inhibits hardening of the arteries, enhances elasticity of blood vessels, and helps to maintain healthy blood pressure. . In addition to limiting your intake of fats and sugars, eating onions can get your blood sugar-and your weight-on the right Furthermore, onions contain fiber and folic acid, a B vitamin that helps the body make healthy new cells. Onions are healthy whether they're raw or cooked, though raw onions have higher levels of organic sulfur compounds that provide many benefits,
The onion, also known as the bulb onion or common onion, is a vegetable that is the most widely cultivated species of the genus Allium. Its close relatives include the garlic, shallot, leek, chive, and Chinese onion