Vegetables Excellent source of vitamins. Good source of dietary fiber and folate. All vegetables contain healthful vitamins, minerals, and fiber. However, some stand out for their exceptional health benefits. Vegetables are an important part of a healthy eating pattern and are excellent sources of many nutrients, including potassium, fiber, folate (folic acid) and vitamins A, E and C. Including vegetables as part of a healthy eating pattern can reduce the risk of some chronic diseases, including heart disease and type 2 diabetes, as well stroke and cancer.