Among the micronutrients, vitamins are well known, but not well understood by consumers in general. Most people probably think of a bottle of supplements when considering the role of vitamins in their lives, but the best vitamin sources are whole foods. In fact, there is much more bang for the buck by getting vitamins from foods. Individual nutrients lose value by themselves - a prime example of the whole being greater than the sum of the parts. Many nutrients work optimally only when accompanied by cofactors, such as water, other vitamins or fats, among others.