Book excerpt: **THE SUNDAY TIMES BESTSELLER** 'Brilliant! It's hard to change your life - but this book gives you all the reasons it's possible. From the first page to the last, one revelation after another.' JEREMY VINE 'Brilliant . . . especially required reading in these COVID-19 days' LIZ EARLE 'Metabolism, inflammation, and immunity are three sides of the same coin. Fix one and you fix them all. Dr Aseem Malhotra offers you a way to fix all three at once, and the solution is as easy as your fork.' PROFESSOR ROBERT LUSTIG, bestselling author of Fat Chance 'This remarkable book will change your life. Beautifully written, it compiles in one place the health messages we all know make sense. PROFESSOR KAROL SIKORA, leading cancer specialist and Founding Dean, University of Buckingham Medical School 'Read this book and follow the plan, it may save your life.' GURINDER CHADHA, OBE, director of Bend It Like Beckham 'A crystal-clear roadmap to reverse the roots causes of our poor metabolic and immune health. It is the handbook of health for our time.' MARK HYMAN, New York Times bestselling author of Food Fix ******* The simple, evidence-based diet plan to rapidly improve your metabolic health, help with normal immune function and likely reduce the risk of severe effects from Covid-19. Dr Aseem Malhotra is a leading NHS-trained cardiologist and a pioneer of lifestyle medicine. He has been at the forefront of citing the health conditions which make us vulnerable to the worst effects of Covid-19. Obesity, Type 2 diabetes and heart disease are high among them - and all indicators of poor metabolic health. The good news is that in just 21 days we can prevent, improve and even potentially reverse many of the underlying risk factors that exacerbate how infections, including Covid-19, affect us and improve our ability to recover from them. Giving us the evidence-based science behind the plan, Dr Malhotra shares how simple changes to our diet as well as daily exercise and stress relief can have remarkable results in improving our markers for metabolic health, even helping to put Type 2 diabetes into remission, reduce risk factors for heart disease, decrease weight and enhance vitality. Arguing for the huge benefits to global health of these highly effective lifestyle changes, he shows how just 21 days can help us to start the journey to lead a healthier and longer life.