No. The e-liquids contain mainly substances known as propylene glycol (PG) and vegetable glycerine (VG). Operated in the universe in the food and pharmaceutical, the PG accentuates the aromas and enhances the hit of nicotine. As for the VG, it increases the volume of the steam generated. It shows no toxicity. It is used at the level of the food industry, pharmaceutical and cosmetics industries. Like the flavors, nicotine is not a carcinogenic substance in the absence of combustion.