E Cigarettes Side Effects of Vaping You Should Be Aware Of & How To Avoid Them! 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. Can Doctors Tell If You Vape? You might think vaping is invisible but your doctor may spot the signs From breathing changes to nicotine testing, vaping can leave clues behind.