E cigarettes contain hazardous substances, addictive and harmful Don't be foolede cigs or vapes may be less harmful than cigarettes, but less harmful doesn't mean safe. Vapes can contain harmful substances including nicotine, heavy metals like lead, volatile organic compounds and Some reports state that these new, flavored smoking devices are less harmful than tobacco cigarettes but how safe is vaping? In this third part of a four part series, China Daily examines the Vaping vs Cigarettes Health Impacts Compared