For years, doctors have counseled patients with high blood pressure to cut back on sodium, or salt. That’s still good advice. But making sure you get enough potassium may be just as important.

Does soy deserve its reputation as a superfood? Not long ago, the American Heart Association convened a top-level scientific advisory panel to find out.

A calorie is a calorie is a calorie, nutritionists like to say. But the calories in beverages can add up fast without making a dent in hunger.