We are currently witnessing a paradigm shift in the understanding of autoimmune disease. The latest scientific research reveals that the balance of bacteria in an individual's microbiome can have a profound impact on inflammation throughout the body. In those with psoriasis or autoimmune arthritis, there is often a characteristic lack of certain beneficial bacteria that normally regulate the immune system - known as "keystone" species." This is typically coupled with an overabundance of potentially harmful bacteria that further trigger the inflammatory response. The Keystone Approach calms inflammation at the source by restoring the balance of good and bad bacteria in the microbiome. Based on an in-depth analysis of the latest scientific evidence, The Keystone Approach also explains how to optimize the Mediterranean diet for the greatest reduction in inflammation, along with providing detailed guidance for choosing supplements supported by good-quality clinical trials B̃ack of book.