While vaping is not risk free, it is less harmful than tobacco Our World in Data Vaping releases toxic chemicals, including heavy metals, as well as ultrafine particles that go deep into the lungs. These increase the risk of heart and lung disorders. No, vapes aren't 95% less harmful than cigarettes. Here's how this decade old myth took off Avoiding Tobacco Smoke and E Cigarette Aerosol Is a Key Part of Asthma Management Asthma and Allergy Foundation of America Vaping harms your health Cancer Institute NSW Vapes on black market may contain toxic chemicals, pesticides, harmful flavorings