A study of published literature that reported the effect of dietary counseling for weight loss finds that, on average, dietary counseling has resulted in weight loss of approximately 6 percent of initial body weight (approximately 10-15 pounds) after one year, compared with people not involved in formal weight loss programs. Approximately half the weight loss remained at three years, but almost none of the weight loss remained at five years. The study, "Meta-analysis: Effect of Dietary Counseling for Weight Loss," appears in the July 3, 2007, issue of Annals of Internal Medicine.
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