... g of fiber and 12.5 g of sugar. Oat-based O's contains approximately 100 calories, 2 g fat, 190 mg sodium, 3 g ... of fiber and 1 g of sugar per serving. ... Diet cereal flakes contain approximately 120 calories, 0.5 g ... cereal, while cereals containing between 2.5 g and 4.9 g per serving are good, but not ...