The SlimFast Original Meal Replacement Shake Mix is clinically proven to lose weight fast. It contains 10g of protein along with 5g of fiber and 24 essential vitamins and minerals that help a person s body process and burn stored fat making it easier to lose weight. The SlimFast original shake is tasty and can curb hunger cravings for up to four hours. Each 8 fl oz serving contains 200 calories giving you plenty of energy to keep your body alert during the day. One of the essential elements of this clinically proven weight loss program is replacing two daily meals with SlimFast. The 12.83 oz container makes 14 delicious weight loss shakes.