Vitamins are necessary for the normal functioning of the body.
However, taking vitamin supplements on a regular basis is not necessary. Breast milk contains adequate amounts of all vitamins except vitamin D , which may need to be supplemented. This is especially important in the winter months when children are not out in the sunlight as much. Sunlight helps the body produce or use vitamin D. Commercial infant formulas contain vitamin supplements. After one year of age, children should be eating a diet containing foods from each of the four food groups listed in Canada's Food Guide to Healthy Eating .