After practicing as a neurologist and neurosurgeon in her Russian homeland, Dr. Natasha Campbell-McBride moved to the UK, where she developed her theories on the relationship between neurological disorders and nutrition. She completed her second postgraduate degree in Human Nutrition at Sheffield University, UK, and currently runs the Cambridge Nutrition Clinic. She specializes in nutritional treatments, and has become recognized as one of the world s leading experts in treating children and adults with learning disabilities and other mental disorders, as well as children and adults with digestive and immune disorders. She is the author of Gut And Psychology Syndrome (Revised Edition 2010), in which she explores the connection between physical state and brain function; Put Your Heart in Your Mouth (Revised Edition 2016), which reviews natural treatments for heart disease, and Vegetarianism Explained (2017), which compares the physiological benefits of animal- and plant-based foods. Dr Campbell-McBride frequently gives talks to health practitioners, and at professional conferences worldwide. She is a Member of The British Society for Environmental Medicine, and a Board Member of the Weston A Price Foundation, and is a regular contributing health editor to journals, magazines and newsletters in English speaking countries around the world.