side effects of fluoride toothpaste
Dental Fluorosis. One of the most visible and well-recognized side-effects of ingesting fluoride toothpaste is a discoloration of teeth called  Dental Fluorosis .. Fluoride produces dental fluorosis by damaging the cells (ameloblasts) which produce the tooth's enamel.
Sodium fluoride, a mineral used to strengthen teeth and prevent cavities, can have some side effects when taken as a prescription drug. In children whose teeth are still developing, sodium fluoride can cause white, brown, or black spots on the teeth.