To do this you go on the maintenance programme with liportim, The total calorific content of two shales is just over 500 cals.. but they contain carbs so do not work on ketosis premise but on low calorie weight loss... to lose weight this way you must stick to the two shakes, have either lunch or dinner of an extremely low calorie meal such as steamed fish. chicken veg etc. not snack etc. As other posters have said if you are going to eat then perhaps slimming world , weightwatchers etc might suit as the weight loss using the mainteneance sachets is as slow as any of these other plans, averaging between one and 2 lbs per week x