A groundbreaking program to help you sleep faster and better from the bestselling author of The FastDiet, revised and updated with bonus material on brain health, mood, immunity, and metabolism. We know a good night's sleep is essential for a healthy brain and body. But sleep problems are sadly all too common. So why do so many of us struggle to sleep well? In Four Weeks to Better Sleep, Dr Michael Mosley explains what happens when we sleep, what triggers common sleep problems, and why standard advice rarely works. Prone to insomnia, Mosley took part in numerous sleep experiments and tested every remedy. The result of his research is a radical four-week plan, based on the latest science, designed to help you re-establish a healthy sleep pattern in record time. With surprising recommendations--including tips for teenagers, people working night shifts, and those prone to jet lag--plus recipes that will boost deep sleep by improving your gut microbiome, Four Weeks to Better Sleep provides the tools you need to reduce stress and feel happier. An indispensable program, it will not only get you to sleep faster but improve the quality of your sleep, so you wake rested and refreshed. *Previously published as Fast Asleep (2020), this expanded edition features new science from the author's 2022 BBC Horizon documentary; the results of his own successful sleep experiments; "10 Thing You Can Change With Better Sleep"; and a detailed four-week plan with easy-to-follow tips, exercises, and delicious gut-friendly recipes.*