Ralph Campbell, M.D., is a lifelong advocate of nutritional medicine. He maintained a large pediatric practice in Southern California for thirteen years before moving to Polson, Montana, in 1970. Dr. Campbell conducted wellchild clinics for the Salish Kootenai Reservation, established the Lake County Health Department, and had a private pediatric practice.

Most people's diets are woefully inadequate for providing proper nutrition. Even good diets fail to deliver sufficient levels of nutrients. The 'Vitamin Cure' book series highlights the safe and clinically effective use of vitamin supplements for a variety of illnesses.