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Christian B. Allan, PhD, has performed research on the chemistry of minerals, biochemistry, and nutrition at Lawrence Berkeley Laboratories, the University of Massachusetts in Amherst, and the National Institutes of Health. He currently works for a biotechnology company in Maryland. Wolfgang Lutz, MD, has studied low-carbohydrate nutrition on thousands of patients in his clinical practice. He has had great success in alleviating their ailments and building a comprehensive theory to explain why low-carbohydrate diets improve human health.