Sometimes true, as, for instance, with calcium supplements (with vitamin D). But don’t be misled into thinking that it’s better to down pills than to down vegetables. Orange juice has more in it than just vitamin C. And foods don’t just have a biochemical importance; they can create a kind of energy force in your body. For example, it may be that it’s not one nutrient that helps prevent cancer or reduce heart disease, but rather the combination of several ingredients that does the trick. And that’s the kind of nutritional power you find only in the way nature makes our food. In fact, we believe that the study of how food can heal is the next frontier in medicine.