Yogurt was recently identified as a top weight-loss-promoting food by Harvard University. It’s high in protein, which, gram for gram, helps fill you up more than carbs. Stick to plain, low-fat or nonfat yogurt for a healthy snack, without extra sugar or saturated fat. Another diet bonus? The probiotics in yogurt may help you burn fat. In one study, researchers gave overweight, but otherwise healthy, adults about 1/2 cup of yogurt at dinner every night for six weeks. Some ate yogurt supplemented with an added dose of probiotics (either Lactobacillus fermentum or L. amylovorus), while others got regular yogurt (which has a lower probiotic content ). Though none of the subjects lost weight, those consuming the probiotic-enriched yogurt lost 3 to 4 percent of their body fat, compared to just 1 percent body fat lost in the other group. To ensure your yogurt delivers a decent amount of probiotics, look for one that carries the "Live & Active Cultures" seal.