This product contains water, propylene glycol, nicotine, a scent that emulates tobacco flavor and a simple membrane to suspend the ingredients. None of the ingredients are carcinogenic (cancer-causing) agents. The FDA has called propylene glycol safe.
Nicotine is not believed to have toxicological effects, it offers some therapeutic uses and it can be found in many common foods, including pepper, tomato, eggplant and potato.
Cigarettes and cigars contain tobacco, along with hundreds of additives, including glue and paper, which when burned, harm nearly every organ of the body, and cause cancer, and cardiovascular and respiratory diseases.