What are the ingredients of e-liquid?
That varies depending on the e-liquid you choose. ULTRApure E-Liquid is made from pure vegetable glycerin and deionized water. It contains 99+% pure nicotine. Ethyl maltol, a non-toxic flavoring, is added to Regular. Pure menthol crystal, dissolved is ethyl alcohol, is added to menthol. ULTRApure contains no propylene glycol which has been found to sometimes cause allergic reactions in people who smoke e-cigs. ULTRApure also does not contain any known carcinogens.