Googled it and got this.. A hepatologist is the most experienced and qualified type of doctor to treat people with liver disease. Since there is currently no separate board certification examination in the field of hepatology, there is no official definition of a hepatologist.
Isatis tinctoria, with Woad (; or glastum) as the common name, is a flowering plant in the family Brassicaceae. It is commonly called dyer's woad, and sometimes incorrectly listed as Isatis indigotica (a newer and invalid name for the same plant).
The leaves and roots of the plant are used in traditional Chinese medicine. Isatis is used to treat the common cold and other infections of the nose, throat, and sinuses (upper respiratory tract infections), as well as infections of the glands that make saliva (parotitis).