Nicotine is the most addictive substance currently known in the world that is even more addictive than heroin. E cigarettes contain Nicotine that is highly toxic chemical that can adversely affect any organ of the body. Nearly 80 percent of those who start E cigarette to quit cigarettes can't quit the E cigarette. Contrary to claims of E Cigarette lobby, E cigarette has not been approved as a cessation drug or tool. Stop smoking via all forms of nicotine to prevent cancer and other diseases. Contact Dr Jaipalreddy MS MCh surgical oncology for further help.