Fluoride's Effect on the Gastrointestinal Tract
Gastrointestinal symptoms like nausea, abdominal pain and vomiting are the most common early symptoms of acute fluoride poisoning. For people who are sensitive to fluoride, ingesting 1 mg tablets of fluoride or drinking 1 parts per million of fluoridated water can cause these gastrointestinal symptoms. A 5-to-10 gram dose of fluoride for an adult or 500 mg dose for a child can cause damage to the body’s major organs and even cause death.