Tauroursodeoxycholic acid (also known as TUDCA) is an ambiphilic bile acid. It is the taurine conjugate form of ursodeoxycholic acid. Humans are found to have trace amounts of TUDCA. How is Tudca used as a supplement? TUDCA can be taken daily at dosages between 250mg and 1000mg, some user take more reporting even greater liver detoxification.