Some of the answers to your fluoride questions can be found here:
In summary, fluoride is safe and effective within the recommended dose of 0.7-1.5 mg/L. Fluoride significantly reduces the risk of dental caries and there is no scientific proof that fluoride causes any type of cancer or is related to cancer.
In very excessive doses 10mg/L and 10 years of repetitive exposure at this dose, fluoride can cause skeletal fluorosis, making the bones more brittle.
Emma Johnson is the owner of Pearl Boutique, a clinic that specializes in teeth whitening. She is a registered dental hygienist and completed her diploma at Camosun College, which offers one of the best recognized dental hygiene programs in Canada. Emma also holds a health science degree in kinesiology from the University of the Fraser Valley.