Kuding (Chinese: 苦丁茶; pinyin: kǔdīng chá; lit.
'bitter nail tea'; pronounced [kʰù.tíŋ ʈʂʰǎ]) is a particularly bitter-tasting Chinese infusion, which due to their similarities in appearance is derived from several plant species.
It is also said to calm fidgets and alleviate thirst, especially when one is suffering from a disease that causes fever or severe diarrhea.
It has the reputation of preventing deterioration of the heart and brain function and maintaining proper body weight.
[6] Triterpenes and their glycosides (saponins) are contained as bitter components, and a variety of them have been isolated from the plants that produce kuding, such as ursolic acid, pentene, lupeol, taraxerol, and uvaol.