I bought this for my husband who had a terrible cough and flu that was persistent. Within days, his symptoms started to ease up and he started to feel better.I believe it helped in two ways. It killed germs in his nasal cavities and even down in his lungs. His phlegm went from greenish to clear. But our bodies need iodine, too. If you’ve ever had your thyroid checked... T3 means for every thyroid molecule, there are three iodine molecules. T4 has four iodine molecules attached. Your body really needs iodine! It used to be a cure all. I drink a few drops of Lugols 2% Iodine every morning in water. I never caught my husband’s flu! 😀