Diet News: Low-cal ketogenic diet slows brain cancer in mice A calorically restricted ketogenic diet decreases the growth of malignant brain tumors in laboratory mice, according to an online report in the journal Nutrition & Metabolism. Calculating Your Waist Circumference When diet and exercise aren't helping you lose belly fat, medications and surgery may do the job. Trans fats linked to greater heart disease risk A study published today supports recent efforts to rid the American diet of trans fats. In the study, women with the highest levels of trans fat in their blood had triple the risk of heart disease as those with the lowest levels. Blueberry-rich diet may keep the colon healthy A natural antioxidant abundant in blueberries called pterostilbene may help prevent colon cancer, according to an animal study reported Sunday in Chicago at the 233rd national meeting of the American Chemical Society. 'Good fat' diet called fine for heart attack survivors Researchers tested the diet idea on 202 people who had suffered heart attacks in the previous six weeks.