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'I read this eagerly because I am desperate for tips on how to sleep better. It is based around the revolutionary idea that when it comes to sleep what matters is not the hours you spend in bed but the quality of the sleep you are getting - your sleep efficiency. This book was full of surprises!' -- Jeremy VineGroundbreaking sleep science from the bestselling author of The 5:2 Fast Diet and The Fast 800A good night's sleep is essential for a healthy brain and body. So why do so many of us struggle to sleep well?In Fast Asleep, Dr Michael Mosley explains what happens when we sleep, what triggers common sleep problems and why standard advice rarely works.Prone to insomnia, he has taken part in numerous sleep experiments and tested every remedy going. The result is a radical, four-week programme, based on the latest science, designed to help you re-establish a healthy sleep pattern in record time.With plenty of surprising recommendations - including tips for teenagers, people working night shifts and those prone to jet lag - plus recipes which will boost your deep sleep by improving your gut microbiome, Fast Asleep provides the tools you need to sleep better, reduce stress and feel happier.