Lugol's Iodine solution has a strength of 5% Iodine and makes a highly useful addition to your home's medicine cabinet. Used successfully by doctors for a century, Iodine is an effective and safe natural antibiotic, a powerful anti-cancer (especially breast and prostate) agent, and a potent heavy metal detox tool. Iodine promotes healthy thyroid gland function, a strong immune system and normal energy levels.