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The Psychological Consequences of Dieting

From Cynthia M. Bulik, Ph.D., and Nadine Taylor, M.S., R.D.

Updated January 11, 2005

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The psychological consequences of dieting were clearly illustrated in a classic study of the effects of semi-starvation done in 1950 by Ancel Keys, Ph.D., and his colleagues at the University of Minnesota. In the study, 36 healthy, young, psychologically sound males were observed over a period of 1 year. During the first 3 months, the men ate normal amounts of food; during the next 6 months, they were given half as much food; and during the last 3 months, their food allotment was gradually increased. During the semi-starvation period, the men became preoccupied with food and constantly talked about it, read cookbooks, clipped recipes, and daydreamed about eating. When a meal was served, many took an inordinately long time to eat it, trying to make it last. Over time, the men became extremely depressed, anxious, and irritable.

Once they made it through the period of semi-starvation, the men ate nearly continuously, with some indulging in 8,000- to 10,000-calorie binges. The men reported that their hunger actually increased right after meals, and some of them continued to eat to the point of being sick without feeling satisfied. Although most of the men finally reverted to normal eating patterns within 5 months of the study's end, some continued with their new patterns of "extreme overconsumption."

We see these same patterns in dieters: the preoccupation with food; the anxiety, depression, and irritability; the tendency to go off the diet and eat more than one would have in the pre-diet days; and a propensity toward bingeing even after the diet has ended.

Reprinted from: Runaway Eating: The 8-Point Plan to Conquer Adult Food and Weight Obsessions by Cynthia M. Bulik, Ph.D., and Nadine Taylor, M.S., R.D. © 2005 Cynthia M. Bulik, Ph.D., and Nadine Taylor, M.S., R.D. (January 2005; $14.95US/$20.95CAN; 1-59486-038-6) Permission granted by Rodale, Inc., Emmaus, PA 18098. Available wherever books are sold or directly from the publisher by calling (800) 848-4735 or visit their website at www.rodalestore.com

Authors: Cynthia Bulik, Ph.D., is the William R. and Jeanne H. Jordan Distinguished Professor of Eating Disorders at the University of North Carolina at Chapel Hill. She is also a professor of nutrition in the School of Public Health and the director of the UNC Eating Disorders Program.

Nadine Taylor is a registered dietitian and chair of the Women's Health Council of the American Nutraceutical Association. She is the author of numerous health books and articles.

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