You probably already knew that vegetables are a good source of fiber. But if you’re not eating enough, now might be the time! A one cup serving of broccoli has a whopping 5.1 grams of insoluble fiber to help out your digestive system in a major way. Insoluble fiber differs from the soluble fiber that attracts water. Insoluble fiber can’t be completely digested by the body so it helps to move things along more quickly through the body.