+Iodine (I) is a nonmetallic [chemical element](/wiki/chemical_element) known for its striking deep violet vapor. Essential for life, especially in [thyroid](/wiki/thyroid) hormone production, it is often found in the sea and as an additive to table salt.
+## See also
+- [Periodic Table](/wiki/periodic_table)
+- [Nutrient](/wiki/nutrient)
+- [Halogen](/wiki/halogen)