Young people who vape may be more likely to start smoking Adolescence is a critical window for brain development. Nicotine exposure during this time increases the risk of addiction. Many young people who vape have never smoked. But those who vape are more Is Vaping Reducing Smoking? It's Hazy. Vaping on the rise in U.S., especially among young people Pew Research Center Vaping and smoking together increases lung cancer risk fourfold