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A member asked:
How much fluoride is considered safe?
5 doctors weighed in across 2 answers
In drinking water...: The World Health Organization considers 1.5 mg/l of fluoride or lower safe In drinking water. Above 1.5 mg/l dental fluorosis may occur to an objectionable degree. Concentrations between 3-6 mg/l may cause skeletal fluorosis. Above 10 mg/l can cause crippling skeletal fluorosis. Optimally fluoridated water in the USA is kept at about 0.7 mg/l and is not a problem.
Answered 11/28/2014
3.6k views
4.0 mg/L: EPA has set this level of protection based on the best available science to prevent potential health problems. Fluoride is safe and effective.
Answered 4/1/2015
3k views
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