Is vaping more dangerous than smoking? UK Addiction Treatment Centres Caption: You might see flavor. Your body sees chemicals. Vapes can contain: Nicotine (highly addictive) Heavy metals (like lead) Harmful chemicals that can affect your lungs Just because it How long does vape smoke stay in the air? Is Vape Smoke Harmful? What's The Difference Between Smoke & Vapor? Vaping is often marketed as a safer alternative to smoking, but many vape products contain nicotine, harmful chemicals, and heavy metals that can harm developing brains and lungs.