Polyunsaturated Fats  Liquid at room temperature, these plant-
and fish-derived fats can lower cholesterol when they replace
saturated fat in the diet.  Sources: Vegetable oils like
safflower, sunflower, soybean, corn, and sesame oils. Sunflower
seeds; soybeans; fatty fish like tuna, mackerel, and salmon; and
most nuts are also rich in these fats.  What you need to know:
Unsaturated fats garner the most attention when it comes to
heart health, and the polyunsaturated type is a good replacement
for saturated fat in the diet, says Julia Zumpano, RD, of the
Cleveland Clinic's department of preventive cardiology. She also
points out that fatty fish like salmon and tuna contain their
own special variety of polyunsaturated fats called omega-3 fatty
acids. These specific fats appear to keep the heart healthy,
even when consumed in small amounts. (One cooked six-ounce
salmon fillet offers about 1.6 grams of omega-3 fats, more than
an adequate daily amount for these omega-3 fats.) What's more,
certain nuts, oils, and