Smoking, Tobacco, E Cigarettes and Oral Health Growing Smiles Vaping Versus Smoking: Are Electronic Cigarettes the Savior? Arteriosclerosis, Thrombosis, and Vascular Biology Switching to E Cigarettes: Healthier Alternative or Hidden Risks? Vaping has become common, but it's important to know what you're inhaling. Many e cigarettes contain nicotine, heavy metals like nickel and lead, and chemicals that can harm your lungs and overall health.