Borderline:Full-fat yogurt. Steer clear. Surprisingly, this stuff contains around four grams of saturated fat per serving -- "and that’s the type that increases an individual’s risk of heart disease,” explains Amy Goodson, registered dietitian in Fort Worth, TX. Better:Light fruit yogurt. Ringing in at around 100 calories each, a typical serving possesses a fraction of the sugar that regular fruit yogurt contains, says Goodson. Best:Low-fat Greek yogurt. “Greek yogurt contains 15 grams of satiating protein per serving -- 10 more than other types to keep you fuller longer -- and it’s tasty without waist-widening sweeteners,” raves Goodson.