Other vegetables are good sources of folic acid, niacin, thiamin and vitamin B-6. A single serving size contains at least 2 grams of dietary fiber. Vegetables are relatively high in mineral content , particularly potassium, magnesium, iron and calcium. However, the amount of these minerals in vegetables is not always a good indicator of their nutritive value to the person who eats them, since some of the minerals present may not be available for the body to use. The so-called bioavailability of a nutrient depends on its form and also on the presence of other substances which may bind or hold the mineral, keeping it from being used by the body.
Vegetables are a good source of total dietary fiber and rich in soluble fiber .
Soluble fiber has been generally considered responsible for many of the beneficial effects of vegetables in reducing cholesterol. Eating foods with a variety of fiber is important for proper bowel function and can reduce symptoms of chronic constipation, diverticular disease and hemorrhoids. Just how dietary fiber is involved is not yet clear. Some of the benefit from a higher fiber diet may be from the food that provides the fiber, not from fiber alone. Therefore, it is important to get fiber from foods rather than from supplements, and to get adequate minerals so you can maintain a healthy balance.