In 1994 a study at Harvard University reported that people who consumed the highest amounts of trans fats had twice the heart-attack risk of those who consumed little. "The more we look at trans fat," says Walter Willett, who worked on the study, "the more we see it is a metabolic poison." Trans fats are particularly harmful because they lower levels of good cholesterol and raise levels of bad cholesterol.
The U.S. Food and Drug Administration now requires food manufacturers to list trans fats (often called partially hydrogenated oils) on nutrition labels, which prompted many food companies, including Kraft, Campbell's, and Wendy's, to reduce or remove trans fats from their products.
Unfortunately, many companies replace trans fats with saturated fats. That's dangerous because saturated fats already make up a larger percentage of most Americans' diets―around 11 percent, as opposed to just 1.5 to 2.5 percent for trans fats, notes Alice Lichtenstein, D.Sc., director of the Cardiovascular Nutrition Laboratory at the Jean Mayer Center on Aging at Tufts University, in Boston. It's important not to consume more saturated fat because you're looking only at the trans fat amounts. "We should try to cut down on trans fats as well as saturated fats," says Lichtenstein.
Juice may serve up vitamins, but it won’t do much to ease hunger: Unlike solid foods, liquids don’t trip the brain’s satiety mechanism. For a more effective snack, pair a glass of 100 percent juice with a few nuts. Get more tips.