January 3/New York/New York Daily News -- In yet another study looking at the dietary role of aging gracefully, researchers at Oregon Health & Science University found people who consumed diets high in trans fats were more likely to have brain shrinkage and scored lower on thinking and memory tests, compared to people who followed a healthy diet, low in trans fats and high in vitamins.

Trans fats are found primarily in frozen, packaged, fast foods, baked goods and margarine spreads.