Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking 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. Vapers & Hookah Smokers Exhale Through Nose More Often Than Cigarette Smokers NYU Langone News What Does Vaping Do to Your Lungs? Johns Hopkins Medicine