Lose Weight and Knock Years Off Your Age. In 'Turn Back Time' Dr Armer Khan tells the reader everything they need to know about how to look good and feel great in older age. With practical, personal and expert advice on the right exercise and nutrition to help you find the right balance in life. This book isn't about fad dieting. This is real advice for people who want to turn back the clock and add extra years to their lives through recognising their bad habits and doing something about it.