What amount of fluoride is optimal?
The estimated range of safe and beneficial intake of fluorides from all sources for adults is 1.5 to 4.0 milligrams per day (mg/day), and less for children and those with renal disease. In contrast, the daily intake of fluoride in regions where fluorosis is most prevalent varies from 10 to 35 milligrams per day (mg/day) and can be even higher in summer months. The World Health Organization’s guideline value for fluoride in drinking water is 1.5 mg/L. Above 1.5 mg/L, mottling of teeth may occur to an objectionable degree. Concentrations between 3 and 6 mg/L may cause skeletal fluorosis. Continued consumption of water with fluoride levels in excess of 10 mg/L can result in crippling fluorosis.

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1. What are the beneficial effects of fluoride?
2. What are the adverse effects of fluoride?
3. How can I be exposed to fluoride?
4. What amount of fluoride is optimal?
5. What should I do if my well water contains too much fluoride?