“Wow! What a good gut-health read. Dr. Mark, one of America’s most trusted doctors, takes you on an easy-reading journey through your gut. As an experienced and science-based author, Dr. Stengler uses memorable phrases and engaging infographics to ‘show and tell’ you how to enjoy his life’s teaching: better gut health, better total-body health. My wish for you wise readers: learn it, do it, and feel it. I personally have followed his good-gut-health plan and am enjoying vibrant head-brain and gut-brain health.”— William Sears, M.D., best-selling author of multiple books, including The Healthy Brain Book

“A brilliant exposé on the true and devastating impact of the leaky gut on the entire body. Dr. Stengler has done it again: he has deciphered and demystified the true health impact of a ‘leaky gut.’ The gut is so much more than the epicenter of digestion. It is the first line of defense and protection from the outside world. Each day we fuel our bodies with food and drink, and we depend on the innate wisdom and integrity of our GI tract and the microbiome to moderate and mitigate what enters our bloodstream and inner workings. Expanding on the concept of leaky gut–leaky brain, Dr. Mark gives you a play-by-play on how a leaky gut impacts each cell of your body. This book is a must-have to know the real truth about leaky gut and overall gut health.”— Chris Meletis, N.D., author of The Disciples’ Diet

“Dr. Stengler shares the research and physiology behind leaky gut syndrome with expertise. This book is written in such a way that patients, physicians, and other healthcare providers alike can learn about leaky gut syndrome and dysbiosis.”— Linette Williamson, M.D., ABAARM

“Chronic health problems dominate our healthcare systems and, for the most part, are ‘managed’ but not cured. In my 45 years in practice, I have come to understand that digestive disturbance is at the root of most chronic disease. Dr. Stengler has written the best book I have yet seen to explain this problem and relate it to various chronic diseases. More importantly, he provides a guide to healing these diseases through specific measures. This is a welcome and timely book. He has done an excellent job, and it shall occupy a spot in my personal library, as well as being a required book for my students. Thank you, Dr. Stengler.”— Jarred Zeff, N.D., L.Ac.

“Dr. Stengler has tackled such a complex issue with ease and practicality. Doctors like him have known for 30 years that gut health is the key to physical and mental well-being. Medical science is just now catching up! In his book, he takes the reader on a journey of understanding the science of leaky gut and dysbiosis through practical steps to help individual conditions. He offers dietary and supplemental recommendations based on a combination of scientific evidence and decades of wisdom. Almost any medical condition you are suffering from deserves his approach to gut health! It is a book I will refer to and recommend to my patients.”— Karima Hirani, M.D., M.P.H., functional medicine practitioner, author of What Your Doctor Didn’t Tell You: How Complementary and Alternative Medicine Can Help Your Pain