Oranges: Don’t just think navels. Tangerines, mandarins, clementines & cara caras are rich in Vitamin C too. Swap your morning OJ for a whole orange, as it has more fiber & takes longer to eat than the juice, to help you feel full on fewer calories (45 cals). Clementines are the perfect snack: small, easy to peel & pop, with soluble fiber that breaks down upon digestion & forms a gel to stabilize your blood sugar levels.