Iodine is a very important nutrient that isn't naturally found in many foods. Nature's Herbs Sea Kelp is a rich natural source of iodine that is easily absorbed and used by your body. Iodine is critical in ensuring proper thyroid health and function. The thyroid controls your metabolism, and low levels of iodine can severely decrease metabolism. Iodine deficiency also leads to other symptoms such as extreme fatigue, depression and weight gain.Nature's Herbs Sea Kelp provides the iodine you need to keep functioning. Nature's Herbs FreshCare system ensures that you receive a high quality, maximum potency supplement.