Phyllis A. Balch, CNC, was a certified nutritional consultant who came to the field as a result of experiencing directly the benefits of using diet and nutrition as remedies for sickness. She was the author of the bestselling Prescription for Nutritional Healing, as well as Prescription for Nutritional Healing- The A-to-Z Guide to Supplements and Prescription for Herbal Healing. In addition to revising the sixth edition of Prescription for Nutritional Healing, Stacey J. Bell, DSc, has been a registered dietitian and nutritionist for more than forty years. She received a doctorate in nutrition, with honors, from Boston University. Bell has served on the faculty at Harvard Medical School and published more than seventy peer-reviewed scientific articles.