Is being overweight or obese harmful to your health? Although the answer may seem obvious; the recommendations to lose weight, two new dissertations from Lund University in Sweden are challenging conventional wisdom. It contends that being fat in itself poses no significant risk. And for overweight patients who have already suffered a heart attack, losing weight can even be dangerous.

• Dr. Ronnie Willenheimer, MD PhD Associate Professor of Cardiology, Lund University, Dept of Clinical Sciences, Medicine, University Hospital Malmö, Sweden