It is Luo Han Kuo (LHK) and it only grows in areas of southern China but is pretty well-known in Hong Kong and several countries in East Asia as well as used regularly in Japan. The website says its antioxidant power is 221 ORAC units per gram(!!). It naturally cools the body and is good for the lungs, so I just wanted to pass the word that they're having a promo this month to get the drink free and see if anyone else has had any experience with it...?