Research indicates that several of the nutrients found in a multivitamin supplement play important roles in preventing chronic diseases like heart disease, cancer, and osteoporosis. A vitamin is an organic substance or chemical found in food that is absolutely necessary for life. We now know that, although vitamins each have individual roles in the body, they also work together as a team to maintain normal physiological functions. A daily multivitamin/micronutrient supplement ensures adequate intake of several nutrients that might be lacking in processed, cooked, denatured, or overfarmed foods in today’s diet.