This is an herbal aid for the thyroid and assisting glandular systems. These herbs assist in controlling metabolism and give herbal feeding to the thyroid glands to help them do their job more efficiently. This is a very fine glandular aid. For additional help with the glandular systems as a whole, use Mullein and Lobelia, which is a specific for malfunctioning glands. All encapsulated products are in a pure 100% vegetable based capsule.