UCLA study finds even short term vaping poses significant risk to health Daily Bruin THE FACTS ABOUT VAPING Moffitt experts note that switching to vaping may reduce harm for people who smoke, but it's not risk free, and the safest choice is still not to start. Balancing two priorities is key 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.