It's ok to put a little butter on your corn on the cob and add a bit more dressing to that salad. The nutrients in some vegetables are fat soluble and are absorbed much better by the body when accompanied by a little fat. A study conducted at Ohio State University, found that the absorption of nutrients was not only higher when accompanied by fats, but that it was actually minimized when the fat-free foods were eaten alone.
Previous studies have shown the same results in rats, but this study followed the nutrient absorption of human diets. It was a follow-up to a 2004 study that tracked nutrient absorption when comparing low fat salad dressings to fat-free ones. In this one, salsas and salads were served to participants with and without avocado. Absorption of beta carotene jumped by up to 18 times the amount, and lycopene jumped as much as 7 when the avocado was included, even controlling for the nutrients added by the avocado itself.






