Bio-Botanica, Inc. Feverfew Herb In Butylene Glycol is a product under the plant family Asteraceae, with the Latin name Tanacetum parthenium. It contains sesquiterpene lactones, essential oils, and flavonoids. This product serves the food/beverage/dietary supplement functional categories of immune support and nervous system support. It also has applications in the cosmetic/personal care functional category for oral health.