What does the evidence say about youth vaping? study Dr Colin Mendelsohn Vaping and smoking together increases lung cancer risk fourfold Today we released a new report on vaping among youth and young adults in NYC, with recommendations on how to address this issue. Despite declines in cigarette smoking, new data show vaping Vaping isn't harmless. Early nicotine use can harm brain development, affect how nerve cells work, and increase the risk of addiction. Young people who vape are 4x more likely to start smoking Vaping: How popular are e cigarettes?