over 65 publications. Dr. Barr has served as vice president of the Canadian Dietetic Association (now Dietitians of Canada) and is a Fellow of both the Dietitians of Canada and the American College of Sports Medicine. She is currently a member of the Scientific Advisory Board of the Osteoporosis Society of Canada and the Medical Advisory Board of the Milk Processors Education Program.

GEORGE C. BECKING, Ph.D., is an associate with Phoenix OHC, Inc., Kingston, Canada, specializing in toxicology and risk assessment related to human health effects of chemicals. Previously, hex was a scientist with the World Health Organization (WHO), Geneva, working in the International Programme on Chemical Safety, and a Research Scientist and Scientific Manager at Health Canada. At WHO, his responsibilities included the evaluation of human health risks from a wide range of chemicals including the essential metals copper and zinc. At Health Canada, Dr. Becking worked as a research scientist with a major focus on the effects of nutrition on the metabolism and toxicity of chemicals. Dr. Becking earned his Ph.D. in biochemistry from Queen's University in Kingston, Ontario. He has published over 60 papers and book chapters in the fields of biochemistry, toxicology, and risk assessment methodology.

GARY R. BEECHER, Ph.D., received his Ph.D. in biochemistry from the University of Wisconsin, Madison. Currently, Dr. Beecher is a research chemist in the Food Composition Laboratory at the U.S. Department of Agriculture Beltsville Human Nutrition Research Center. He has over 30 years of professional research experience in analytical chemistry of biological and food systems. Dr. Beecher's recent work has been on investigating the relationship of dietary and plasma carotenoids. He is involved in developing methods for the measurement of flavonoids and the analysis of foods for these constituents. Dr. Beecher was the co-chair of the Symposium on Healthy Diets and Food Trade: The Role of Food Composition Data at the International Congress of Nutrition in July 1997.

SUSAN T. BORRA, R.D., is Senior Vice-President and Director of Nutrition at the International Food Information Council. Ms. Borra is responsible for directing communications programs, executing public affairs strategies, and managing nutrition and food safety issues. Additionally, she oversees the development of consumer education materials and nutrition, food safety, and health programs. Ms. Borra is a member of the American Dietetic Association and is immediate past chair of the American Dietetic Association Founda-



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