• A (Very) Short History of Fluoride
  • May 22, 2017 | Author: Steven L. Hoch
  • Law Firm: Morris Polich & Purdy LLP - Los Angeles Office
  • We are going to talk about fluoride. Fluoride is found naturally in soil, water, foods, and several minerals, such as fluorapatite and fluorite. Fluoride concentration in seawater averages 1.3 ppm (parts per million), which is probably good for maintaining a shark’s teeth free from cavities. In fresh water supplies the natural range is typically 0.01 to 0.3, which helps strengthen trout’s teeth so they can fight back when Yogi Bear is looking for dinner. (Do trout have teeth?) Groundwater can contain much higher levels, however. Fluoride is the 13th most abundant element on the earth's crust. (Good fact to drop at a bar¿will certainly get a conversation going.)