Nicotine-based e-cigarettes may increase the risk of some cancers

By Katia Hetter, CNN (CNN) — Vaping is often marketed as a safer alternative to cigarettes, but safer doesn’t always mean safe. New evidence suggests that nicotine-based e-cigarettes may increase the risk of some cancers, according to a recently published review in the journal Carcinogenesis. What did the study find — how could vaping contribute