 It is supposed to be based only on the "spicata" variety of wormwood (today classified as "Artemisia genipi".In 2000 a liqueur branded as "Génépi des Pères Chartreux" premiered, based on neutral spirits instead of the nearly universal “eau-de-vie”.The goal is to provide a "cleaner" drinking experience, but opinions differ as to whether the difference is even perceptible.