Always read the label and follow the directions for use. Opitfast VLCD Bars are part of a nutritionally complete, very low calorie diet program. High in protein & contain essential nutrients for effective weight loss. One serve is one meal. Every bar contains 24 key vitamins and minerals to assist with safe and effective weight loss on the OPTIFAST Program. High in protein and fibre, the bars offer convenient nutrition that can be consumed in place of a meal. If you don't have time to prepare a shake or simply love a bar - OPTIFAST VLCD Bars are a great option that can be enjoyed any time of the day and on-the-go! The OPTIFAST Program is scientifically designed to help you achieve effective weight loss results. Whichever program level you're on - OPTIFAST VLCD Bars can be used to replace one, two or three meals. If you like to mix it up, look at our variety of OPTIFAST VLCD Shakes, Desserts and Soups and build a mix of meal options that suit your preferences and taste buds.