When we eat may be as important as what we eat. Like most people, you probably wake up, get hungry for meals and doze off in bed around the same time every day. If you’ve ever experienced jet lag or pulled an all-nighter, you know that this schedule can easily be thrown off kilter. But for some people, that imbalance—difficulty sleeping at night, hunger at odd times, or sudden fatigue at noon—is a constant. If you're one of those people, Dr. Satchin Panda, one of the leading researchers on circadian rhythms, has a plan to reset your body clock. Beginning with an in-depth explanation of the circadian clock—why it’s important, how it works, and how to know it isn’t working—The Circadian Code outlines lifestyle changes to make to get back on track. It's a concrete plan to enhance weight loss, improve sleep, optimize exercise, and manage technology so that it doesn’t interfere with your body’s natural rhythm. Dr. Panda’s life-changing methods show you how to prevent and reverse ailments like diabetes, cancer, and dementia, as well as microbiome conditions like acid reflux, heartburn, and irritable bowel disease.

Popular science at its most exciting: the breaking new world of chronobiology - understanding the rhythm of life in humans and all plants and animals. The entire natural world is full of rhythms. The early bird catches the worm -and migrates to an internal calendar. Dormice hibernate away the winter. Plants open and close their flowers at the same hour each day. Bees search out nectar-rich flowers day after day. There are cicadas that can breed for only two weeks every 17 years. And in humans: why are people who work anti-social shifts more illness prone and die younger? What is jet-lag and can anything help? Why do teenagers refuse to get up in the morning, and are the rest of us really 'larks' or 'owls'? Why are most people born (and die) between 3am-5am? And should patients be given medicines (and operations) at set times of day, because the body reacts so differently in the morning, evening and at night? The answers lie in our biological clocks the mechanisms which give order to all living things. They impose a structure that enables us to change our behaviour in relation to the time of day, month or year. They are reset at sunrise and sunset each day to link astronomical time with an organism's internal time.

Wouldn't you like to know how to slow down time? We constantly check our watches and complain how time flies. We think that time is equal to the watches we wear on our arms. However, the actual time keeper is a particular center in our brains. This center, which keeps the biological time for the body, immediately informs all organs what time it is. The entire body has clocks. Yes, there is an inner clock in the brain, in the pancreas, in the liver, in the gut, in all the cells, and even in the DNA. Why do we need so many clocks? It is essential for the body to function by following a certain rhythm in order to coordinate billions of actions taking place. In any organ functioning outside this rhythm, there will be chaos instead of order. And chaos means disease. What prevents chaos is the inner biological clock of the body. The inner biological clock synchronizes us with the external time. The tuning of the inner clock should not be disrupted. If the inner clock is disrupted, we become ill. If the inner clock is disrupted, we age rapidly. If the inner clock is disrupted, we gain weight... Yes, what we are supposed to eat if we want to be healthy has been emphasized over and over again. But, the vital question is "when do we eat?" Both gaining weight and losing weight is a matter of "time." "Circa" means about; "diem" means day. Circadian diet defines the lifestyle and eating habits according to the hours of the day. The price of disrupting the circadian rhythm is accelerated aging. The price of disrupting the circadian rhythm is disease. The price of disrupting the circadian rhythm is weight gain. Timing is everything. Timing is the new topic of medicine. Welcome to circadian medicine!

This Very Short Introduction explains how organisms can 'know' the time and reveals what we now understand of the nature and operation of chronobiological processes. Covering variables such as light, the metabolism, human health, and the seasons, Foster and Kreitzman illustrate how jet lag and shift work can impact on human well-being.

An introduction to the mathematical, computational, and analytical techniques used for modeling biological rhythms, presenting tools from many disciplines and example applications. All areas of biology and medicine contain rhythms, and these behaviors are best understood through mathematical tools and techniques. This book offers a survey of mathematical, computational, and analytical techniques used for modeling biological rhythms, gathering these methods for the first time in one volume. Drawing on material from such disciplines as mathematical biology, nonlinear dynamics, physics, statistics, and engineering, it presents practical advice and techniques for studying biological rhythms, with a common language. The chapters proceed with increasing mathematical abstraction. Part I, on models, highlights the implicit assumptions and common pitfalls of modeling, and is accessible to readers with basic knowledge of differential equations and linear algebra. Part II, on behaviors, focuses on simpler models, describing common properties of biological rhythms that range from the firing properties of squid giant axon to human circadian rhythms. Part III, on mathematical techniques, guides readers who have specific models or goals in mind. Sections on “frontiers” present the latest research; “theory” sections present interesting mathematical results using more accessible approaches than can be found elsewhere. Each chapter offers exercises. Commented MATLAB code is provided to help readers get practical experience. The book, by an expert in the field, can be used as a textbook for undergraduate courses in mathematical biology or graduate courses in modeling biological rhythms and as a reference for researchers.

FROM NEW YORK TIMES BESTSELLING AUTHOR DR. JASON FUNG • “The doctor who invented intermittent fasting.” —The Daily Mail “Dr. Fung reveals how [type 2 diabetes] can be prevented and also reversed using natural dietary methods instead of medications … This is an important and timely book. Highly recommended.” —Dr. Mark Hyman, author of The Pegan Diet “Dr. Jason Fung has done it again. … Get this book!” —Dr. Steven R. Gundry, author of The Plant Paradox Everything you believe about treating type 2 diabetes is wrong. Today, most doctors, dietitians, and even diabetes specialists consider type 2 diabetes to be a chronic and progressive disease—a life sentence with no possibility of parole. But the truth, as Dr. Fung reveals in this groundbreaking book, is that type 2 diabetes is reversible. Writing with clear, persuasive language, Dr. Fung explains why conventional treatments that rely on insulin or other blood-glucose-lowering drugs can actually exacerbate the problem, leading to significant weight gain and even heart disease. The only way to treat type 2 diabetes effectively, he argues, is proper dieting and intermittent fasting—not medication. “The Diabetes Code is unabashedly provocative yet practical ... a clear blueprint for everyone to take control of their blood sugar, their health, and their lives.”—Dr. Will Cole, author of Intuitive Fasting

This practical manual presents an innovative modular treatment for adults and adolescents with a wide range of sleep and circadian rhythm problems, such as insomnia, daytime sleepiness, poor sleep quality, and irregular sleep-wake schedules. The treatment applies broadly to all individuals with sleep problems, including those with psychiatric disorders. It is grounded in a cutting-edge understanding of sleep health and integrates elements of cognitive-behavioral therapy for insomnia (CBT-I), interpersonal and social rhythm therapy (IPSRT), and other evidence-based therapies. Each module is described in detail, including specific practitioner guidance, sample scripts, developmental adaptations, and tips for enhancing motivation. Purchasers get access to a Web page where they can download and print the book's 17 reproducible client handouts in a convenient 8 1/2" x 11" size.