When 61 healthy women followed a diet with a hefty dose of natural trans fats for four weeks, researchers found there were no changes in the women's LDL (bad) cholesterol and only small changes in HDL (good) cholesterol, in some women.
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.