Examiner.comDr. Oz discusses 'Five Bite Diet' weight-loss diet and natural mood ...Examiner.comDr. Mehmet Oz examined an extreme diet that promises to help you lose 15 pounds in one week on the April 25 episode of the Dr. Oz Show. Dr. Oz's guest was obesity expert Dr. Alwin Lewis, a proponent of low-calorie diets for weight loss and longevity.