How this diet works:  With more than 25 years experience, Slim-Fast has built a strong case for using meal replacements to lose weight    The plan boils down to a time-tested strategy: Move more and eat less. Dieters eat one balanced meal a day and use Slim-Fast meal replacement products -- shakes, bars, soups, frozen pasta entrees -- to replace the two other meals. For snacks, you can choose real food or 130-calorie Slim-Fast snack bars, (lighter than the meal replacement bars, which pack 220 calories each). To get moving, dieters walk, jog, or do yard work for at least 30 minutes a day

Good Points  Slim-Fast shakes. Slim-Fast meal bars. Slim-Fast microwaveable soups. Slim-Fast pasta entrées. And one meal per day that includes lean meat, starch, veggies and fruit. (Low-carb dieters skip the starch and eat more veggies.) Between meals, you can choose from snack bars or healthful foods such as fruit, veggies, fat-free yogurt, nuts, pretzels, or air-popped popcorn. Fruit is the top choice for dessert, but you can occasionally substitute sugar-free puddings or sorbets.