Swanson Kelp is a unique formula that helps promote thyroid health. This ocean plant is packed with nutrients and is a rich source of iodine, an essential mineral known for healthy thyroid function. Each kelp tablet delivers 225 mcg of iodine. Features: - Thyroid Support - Iodine Source - Mineral Supplement - Great Source of Iodine - Supports Healthy Thyroid Function - May Support a Healthy Body Weight - Science-Backed Quality Since 1969.