Like other vegetables, green beans are a good source of fiber, potassium, and folate, and are an excellent source of protein, iron, and zinc. They contain antioxidants similar to those found in green tea, also known as catechins, which can improve heart health and help prevent cancer and manage/prevent diabetes. Green beans are a good source of vitamins and minerals. Green beans contain many essential vitamins, including folate. One cup of raw green beans contains 33 micrograms (mcg) of folate, almost 10 percent of the daily recommended value. Green Beans