Mullein leaf comes from the flowering mullein plant. It is traditionally used as an expectorant. Mullein leaf extract has antibacterial activities. Anti-parasitic effects are also seen. Thus, it helps to kill roundworms and tapeworms in vitro. It even has anti-tumor capabilities. Mullein leaf tea consist of many nutrients including vitamin B1, B2, B3 and C.It even contains a variety of beneficial constituents like iron, saponins, tannins etc. It also has anti-viral, anti-inflammatory and antioxidative properties.