Less harmful than commercial cigarettes.

Commercial cigarettes contain hundreds of harmful chemicals including 40+ known carcinogens. The e-liquid that become vaporized in an electronic cigarette contain far less chemicals, and are often harmless. A typical e-liquid solution would contain propylene glycol or vegetable glycerin that usually make up about 85% of the solution. The rest 15% of the solution would be nicotine, dozens of flavoring ingredients, and water.