Iodine is found in every organ of the body and is essential for humans. Almost all of us are low on iodine. Low iodine levels are linked to many health problems. In 1829, a French physician named Jean Lugol originated a solution which contains 5% of elemental Iodine in a 10% solution of Potassium Iodide. It has been used steadily ever since. Iodine is an essential mineral, a very high percentage of people are iodine deficient, according to Dr David Brownstein, author of "Iodine: Why You Need It, Why You Can't Live Without It." People take Lugol's Iodine for various benefits, such as to increase energy, boost the immune system and promote detoxification. They also take it for the thyroid gland, as the thyroid requires iodine to function normally. Lugol's Iodine solution is often used as an antiseptic and disinfectant, for emergency disinfection of drinking water. These uses are possible since the solution is a source of effectively free elemental iodine, which is readily generated from the equilibration between elemental iodine molecules and triiodide ion in the solution. It is supplemented with for iodine deficiency. Lugols Iodine was used in the Chernobyl disaster as an emergency source of iodide to block radioactive iodine uptake, it was widely available as a drinking water decontaminant.