Slim Fast 100 Calorie Snack Bars, Chocolaty Vanilla Blitz a line of bars to satisfy your sweet cravings with 100 calories. Lose weight now 3 snacks, 2 slimfast Meal Bars or Shakes plus 1 Sensible Meal Choose 3 Snacks a Day Naturally and Artificially Flavored Chocolaty Vanilla Blitz. A simple daily plan to help you get results and lose weight. Pick 3 nourishing snacks a day fruit, veggies or a Slim-Fast 100 Calorie Snack Bar Choose 2 Slim-Fast 180-200.