Natural Factors Fresh Kelp Extract is a natural source of iodine that the body needs to make thyroid hormones. It is hand harvested in a sustainable manner from the pristine coastal waters of British Columbia. A precision extraction process preserves freshness and kelp’s spectrum of minerals, vitamins, and iodine. Supports normal healthy thyroid function Regulates hormones and metabolism Modulates estrogen levels Lowers the risk of some types of cancer Supports fetal and infant brain and nervous system development Reduces pain associated with fibrocystic breast disease Reduces individual risk factors for cardiovascular disease Supports the immune system Medicinal Ingredients Each serving/drop (0.033 mL) contains: Iodine (Kelp: species from the order Laminariales*; potassium iodide) *(Laminaria setchellii/Macrocystis integrifolia) 800mcg Non-Medicinal Ingredients: Glycerin, purified water, ethanol.