Spring Onions Nutrition – Nutrients in Spring Onions: Spring onions are rich in vitamins including Vitamin C, Vitamin B2 and thiamine. They also contain Vitamin A and Vitamin K. In addition, these are good sources of copper, phosphorous, magnesium, potassium, chromium, manganese and fiber Spring onions are good for cardiovascular health. They lower the oxidation of cholesterol and reduce the risk of coronary heart disease. Sulfur compounds in this vegetable help in reducing and controlling blood pressure levels. Spring onions help to reduce cholesterol levels as well. The chromium content in spring onions provides health benefits of diabetics. It controls the blood sugar levels and improves glucose tolerance. Allyl propyl disulphide is also very helpful in lowering blood sugar levels. Anti-bacterial properties in it help to fight against cold and flu.