We've all heard about the dangers of trans fats. Now it turns out they can do more than just clog your arteries. They might also be messing with your memory. According to findings, presented to the American Heart Association, men who ate large amounts of trans fats showed a significantly reduced ability to recall words during a memory test. The study found those with the most trans fats in their diets suffered as much as a 10% reduction in the words they could recall.