Bio-Botanica, Inc. Eyebright Herb In Glycerin is a product under the plant family Orobanchaceae, with the Latin name Euphrasia officinalis. It contains aucubin and other iridoid glycosides, lignans, flavonoids, tannins, and a small amount of essential oil. This product is used in the food/beverage/dietary supplement functional categories of respiratory support and immune support.