'-Support the health of the nervous system. -Improves thyroid function. -Contains coleus forskohlii and l-selenomethionine. Thyroid hormones  regulate metabolism  and play an important role in growth, cell reproduction and nerve function. Swanson  Thyroid Essentials  provides the best nutrition of the thyroid gland with specialized ingredients such as the standardized Coleus forskohlii, a little known but powerfully beneficial herb and recognized supporters of the thyroid as iodine, zinc, copper and B vitamins.