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Losing Weight Decreases Cancer Risk

July 2011 – About 20 percent of all cancers are caused by being overweight or obese. In this "8 Way to Prevent Cancer" video, Washington University and Siteman Cancer Center prevention specialist Kathleen Wolin, ScD, says the beneficial effects of weight loss on cancer risk begin with losing as little as five pounds. Researchers say to maintain weight loss, individuals should increase physcial activity and reduce the number of calories they consume.