A dramatic decrease in the incidence of dental cavities and a reduction of family dental bills are both well established results of fluoride administration in infancy and childhood. The Committee on Nutrition of the American Academy recently published their current recommendations about fluoride supplementation. The Committee recommends fluoride supplementation starting at two weeks and continuing until sixteen years of age for infants and children raised in communities in which fluoride has not been added to the water supply. Supplemental fluoride is not required for children who live in areas whose drinking water contains a sufficient concentration of fluoride.
I suggest that you check the fluoride status of the water supply in your community with your pediatrician or by calling the local Department of Health. If you learn that your water supply contains no fluoride or insufficient fluoride (less than 0.3 parts per million) your baby will require extra fluoride by mouth. This can easily be given in combination with a multivitamin preparation.
The daily dose of fluoride is determined by the level of fluoride of the water supply; this holds true both for breast-fed and formula-fed babies. My advice is to discuss this with your baby's doctor. He should be able to tell you if extra fluoride is necessary and, if so, the correct dose for your infant.