Physician Robert Russell became president of the American Society for Nutrition earlier this year. A policy consultant to the National Institutes of Heath, Russell spent a quarter century with the Jean Mayer USDA Human Nutrition Research Center on Aging at Tufts University in Medford, Mass., most recently as its director. He has authored hundreds of papers on nutrition science, many in the fields of vitamins, food-derived antioxidants and gastrointestinal disease. Science News senior editor Janet Raloff spoke with him about today’s most prominent nutrition issues. What’s the biggest issue... (p. 32)