Fast 800 KetoLose over 6 kg in 21 days with this combined program for accelerated weight loss. In The Fast 800 Keto, Dr Michael Mosley's dynamic new weight loss program combines a ketogenic diet with low calorie intermittent fasting, giving you the best of both worlds to achieve long term success. Dr Mosley presents the latest science on the ketogenic diet (when your body shifts from burning carbs to burning fat for fuel), explaining how keto works and why it is