When it comes to weight loss, there are countless diets, but Michael Mosley says people can apparently see huge weight loss on his Fast 800 diet.
Michael is also the creator of the 5:2 diet and a champion of intermittent fasting.
His Fast 800 diet drastically cuts down on the number of calories you eat in a day - 800, of course - for up to 12 weeks before moving to the Way of Life diet.
