Fluoride Excessive fluoride has been linked to stained and mottled teeth along with a variety of chronic and acute health issues. Let’s find out more about this possibly harmful soluble salt. What is Fluoride? There are two types of fluoride: calcium fluoride and sodium fluoride. When taken in excess, both types can be harmful to health. Calcium fluoride is found naturally in underground waters sources. In sufficient concentrations, it can actually weaken bones and teeth rather than protecting them. However, it is less toxic and damaging to health than its counterpart. Sodium fluoride is much more insidious. Created as a synthetic waste byproduct from the fertilizer, aluminum and nuclear industries, this type of fluoride is added to many public water supplies. Already laden with lead, aluminum and cadmium, sodium fluoride has the ability to combine with other toxic materials and increase their potency. Far from healthy, the side effects of taking fluoride may have ...