Jointflex Herb Tea - 20 bags, ( 20 bags Customer Ratings Jointflex is made of wild dioscorea grown in the pollution-free forest of northeast China. Dioscorea contains trillin, diosgenin, etc. and is used in Chinese medicine mainly to maintain normal joint functions, to improve blood circulation in the limbs, and promote natural healing. Health King herb teas are excellent regular drink good for both hot tea and ice-tea. Use 2 to 4 bags a day. Each bag can be reused twice or three times by refilling water.