There you are, perusing the chilly refrigerated section of your favorite supermarket. Although you buy milk on almost every shopping trip, your mind goes through a familiar dance when faced with a wall of choices. Skim or whole? Is there a difference between 1% and 2% milk, and if so, are such small increments that important? You care about your health and maybe you’re even trying to lose weight, so you pull a carton of skim off the shelf and put it in your basket. But did that deliberation lead you to the right choice? Is skim milk good for you at all?