KnowraLugol's iodineLinked fromLinked fromThe 2 pages that link to Lugol's iodine, each with the reason it gives.All 2Broader topic 1Compared with 1Potassium iodideBroader topic: It is a familiar formulation in which KI helps dissolve elemental iodine.Tincture of iodineCompared with: It contains iodine and iodide like many tinctures but uses water rather than alcohol as its main solvent.