The dried aerial parts of Penthorum chinense, a speciality of Gulin and Shifang in Sichuan also known as “chegengcai” and recorded in the Ming dynasty herbal Jiuhuang Bencao; it has long been used among the people to protect the liver after drinking. Harvested, cleaned, cut and dried before bagging, it can be brewed or decocted, giving a clear golden infusion with a slightly bitter, sweet finish. Containing gallic acid and quercetin, it suits those who drink socially, stay up late or take long-term medication.