The Keystone Approach is based on a profound shift in our understanding of autoimmunity. New clinical studies have found that the cause is often disruption to the microbiome. This may be either an excess of inflammatory species of gut microbes, or a lack of beneficial immune-calming microbes. This innovative new book provides a systematic, evidence-based plan to address both of these elements, from the perspective of an acclaimed science writer who successfully treated her own debilitating psoriatic arthritis. This easy-to-follow plan, based on an in-depth analysis of more than 400 scientific studies, will likely help a wide variety of autoimmune conditions, but it is most specifically tailored to address the underlying causes of psoriasis, psoriatic arthritis, juvenile arthritis, ankylosing spondylitis, uveitis, Crohn's, ulcerative colitis, and rheumatoid arthritis. "It's rare to find an alternative health book so thoroughly backed by scientific studies, but The Keystone Approach is not only a specific, authoritative recommendation, but represents a satisfying intersection of traditional and alternative approaches to healing. It should be in any health collection where autoimmune diseases are of interest." - Midwest Book Reviews Rebecca Fett has "done an excellent job in distilling very complex microbiome science and presenting it in a clear and engaging fashion." - Randy Longman, M.D., Ph.D., Assistant Professor, Weill Cornell Medicine. "The Keystone Approach is a must-read for anyone suffering from psoriasis, joint pain, or any of the host of inflammation related disorders. Rebecca Fett has developed an exhaustively researched but easy to follow protocol to heal the gut and reduce systemic inflammation. Her recommendations are easy to implement and could prove to be life changing." - Robert Santos-Prowse, Ph.D., author of The Ketogenic Mediterranean Diet -"For readers who want to learn more about the way diet can change their quality of life, this manual is easy-to-understand, full of relevant data, and well-organized. A helpful and well-researched plan for improving gut health, reducing inflammation, and avoiding disease triggers." - Kirkus Reviews