Fast 800 is an intensive 12–week diet conceived by Dr Michael Mosley, the creator of the popular 5:2 diet. The Fast 800 combines a Mediterranean-style meal plan with fasting days of just 800 calories for rapid weight loss. Mosley claims the diet can reverse type 2 diabetes, as it did his. The program also includes an exercise component and offers assistance to promote behavioral change. the evidence
The Fast 800 claims are backed by two recent studies, which have shown the diet can result in substantial weight loss along with remission of type 2 diabetes over a one-year period. However, few studies have examined the long-term effects of the diet, and very low-calorie diets can be difficult to stick to. The bottom line is, it’s not for everyone and if you’re considering it, talk to your GP.