A container of plain, non-fat Greek yogurt has around 100 calories and twice as much hunger-squashing protein as traditional yogurt, making it a substantial snack choice for people looking to reign in a hearty appetite. Doctor up a tub of tangy, plain yogurt with skinny stir-ins like chopped fresh fruit, vanilla extract, or a sprinkling of ground cinnamon. Thanks to its rich, creamy texture, plain Greek yogurt also makes a perfect substitute for sour cream and mayo in dips and baked goods — with a fraction of the calories and fat.