Refined Lodised Salt is table salt that has been diluted with a small quantity of iodine-containing salts. Iodine prevents iodine shortage through dietary intake. Iodine is a micronutrient and dietary mineral that is naturally found in some areas food supplies, particularly those close to seacoasts, but is typically quite rare in the Earth crust because Refined Lodised Salt is a so-called heavy element and chemical element abundance typically declines with increasing atomic mass.