Remember simpler days, when cholesterol was a bad thing, and physicians told patients to avoid it. Life got more complicated with HDLs and LDLs, showing that the demon cholesterol had a good side, too. Now, HDLs have themselves come under fire. Not all HDLs are created alike, new research shows, and some can be deadly. Listen as we learn what practicing doctors must know about these new findings. Hosted by Paul Raeburn.