Constipation This is common and to be expected. Bowel movements will typically decrease during a fast simply because there is less food intake. If you are not experiencing actual discomfort, then there’s no need to worry about decreased bowel movements. However, increasing your intake of fiber, fruits, and vegetables during the nonfasting period may help with constipation. Metamucil can also be taken during or after fasting to increase fiber and stool bulk.
