Formerly known as Siberian ginseng, Eleuthero senticosus is a powerful adaptogenic herb that has been shown in studies to help protect against the effects of physical and mental stress* It has been a staple in eastern medicine for over 2,000 years, enjoying a history of both safety and effectiveness. The eleuthero roots used in NOW Eleuthero are carefully selected based on their high eleutheroside concentrations, the plant's active therapeutic compounds. Siberian Ginseng Product Name Change A law was recently passed regarding the use of the name & ldquoginseng & rdquo. The legislation requires that any product called & ldquoginseng & rdquo must be of the panax genus, or it cannot be called ginseng. In light of this new law, NOW Foods has changed the labeling of all products formerly labeled as Siberian Ginseng to Eleuthero.