Fluorine

Fluorine is the 9th element of the periodic table, with symbol F and atomic number 9. Fluoride is not an essential element for humans but small amounts may be beneficial for bone strength ^[1].

References

1. ↑ Nielsen, F. H. (2009). "Micronutrients in Parenteral Nutrition: Boron, Silicon, and Fluoride". Gastroenterology 137 (5): S55–S60.