What is onion useful for, and why should you not neglect it?

3. Rich in fiber. Onions contain both soluble and insoluble (coarse) vegetable fibers. They help to feel full longer, normalize the digestive tract and “feed” the beneficial bacteria of the intestinal microflora. In a conventional cup of onion - up to 12% of the daily fiber requirement. 4. Source of vitamin B6. One medium bulb contains about 8% of the recommended daily value of vitamin B6. It helps your body form red blood cells and breaks down protein.