Unlike protein, carbohydrates and fats, vitamins do not yield usable energy when broken down. They assist the enzymes that release energy from carbohydrates, proteins and fats, but they do not provide energy themselves. (thus, beware of claims for “energy vitamins” or for diets that replace foods with vitamin supplements). Vitamins and minerals are widely available from the natural foods we eat. So, before you reach for the vitamin jar, try eating your vitamins from natural foods.