Which has more calories: unhealthy saturated fat or “heart-healthy” monounsaturated and polyunsaturated fats?
All fats, gram for gram, have virtually the same number of calories. “Fat (whether it’s saturated or not) has nine calories per gram,” says Alice H. Lichtenstein, D.Sc., a nutrition professor at Tufts University. Nevertheless, saturated fat has been linked to high cholesterol and should be limited in your diet, whereas unsaturated fats have heart-healthy properties (but still have calories). Saturated fats, like butter, are typically solid at room temperature, whereas unsaturated fats, like oil, are liquid. • What is the most common nutrient deficiency in America? According to Mary Cushman, M.D., M.Sc., associate professor of medicine and pathology at the University of Vermont, iron deficiency is the most common. Those at highest risk include infants, teenage girls, pregnant women and the elderly. Iron is an essential mineral necessary for the formation of hemoglobin, which carries oxygen in the blood, and myoglobin, which carries oxygen in muscle tissue. In general, dietary iron is ab
