If you’re a non-smoker, you should not start vaping.
Although second-hand smoke is linked to lung cancer, there is no evidence yet that second-hand vapour is linked.
Many of the cancer-causing chemicals are produced from burning tobacco in cigarettes or roll-your-own tobacco. If you’re a smoker, switching to vaping will greatly decrease your risk of cancer.
There are some toxins in vapour, but these are generally at much lower levels than what’s in cigarette smoke, or at levels that are unlikely to cause harm.
Vaping has nicotine, which does not cause cancer. However, nicotine is harmful to children and animals.
Research shows that ‘most toxins responsible for health damage from smoking are absent in e-cigarette aerosol and that those that are present are there at much lower levels ...than in tobacco cigarettes.’ ( Evidence Review of E-cigarettes and Heated Tobacco Products 2018, a report commissioned by Public Health England )