onions offer the most powerful nutritional punch, but the vegetables certainly still has much to offer. Here are some prominent vitamins, minerals, and other nutrients found in onions that deserve some spotlight. Each figure is based on a serving of 1 large onion (150 grams).
Vitamin C – 11.1 milligrams. 19% RDA (recommended daily value).
Manganese – 0.2 milligrams. 10% RDA.
Fiber – 2.6 grams. 10% RDA.
Vitamin B6 – 0.2 milligrams. 9% RDA.
Folate – 28.5 micrograms. 7% RDA.
Potassium – 219 milligrams. 6% RDA.
In addition to the above nutrients, there are a number of other chemical constituents that can be found in onions. Out of them all two powerful antioxidants stand out above the rest