Dr Michael Mosley, author of the bestselling 5:2 Fast Diet, reveals a game-changing approach to one of the greatest silent epidemics of our time - raised blood sugar levels. The food we eat today, high in sugar and easily digestible carbohydrates, is not only making us fat, but is putting us at risk of type 2 diabetes, strokes, dementia, cancer and a lifetime on medication. More than a third of adults in the UK now have raised blood sugar levels and most don't know it.