Swanson Thyroid Essentials - 90 caps Supports nervous system health Enhances thyroid function Contains coleus forskohlii and l-selenomethionine. Thyroid Support Comprehensive Formula Dietary Supplement Supports Nervous System Health Enhances Thyroid Function Contains Coleus Forskohlii and L-Selenomethionine Science-Backed Quality Since 1969 Thyroid hormones regulate metabolism and play a big role in growth, cell reproduction, and nerve function. Swanson Thyroid Essentials provides ultimate thyroid gland nourishment with specialized ingredients like standardized Coleus forskohlii, a little-known but powerfully beneficial herb, and recognized thyroid supporters like iodine, zinc, copper and B vitamins.