Olipop recommends starting with one can per day and increasing over time as tolerated. Since Olipop has nine grams of fiber per serving, beginning with half to one can per day would be ideal for determining if this soda causes digestive discomfort. Olipop recommends starting with one can per day and increasing over time as tolerated. Since Olipop has nine grams of fiber per serving, beginning with half to one can per day would be ideal for determining if this soda causes digestive discomfort.