What is The Fast 800 diet plan?
What is The Fast 800 diet plan? Fast 800 starts with a rapid weight loss phase. You are advised to stay in stage 1 for a minimum of 2 weeks and no more than 12 weeks, and during this time you follow a daily 800-calorie eating plan. You do this by following a relatively low-carb Mediterranean-style diet, with lean protein sources and vegetables.