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. How do vapes work and what chemicals are inside them? BTN High Do you know what's in a vape? Vaping is often marketed as harmless. Flavoured. Trendy. Safer than smoking. But the reality is far more serious, especially for children and teens. When kids vape, they are inhaling addictive nicotine and Pediatric Environmental Health Center E Cigarettes Boston Children's Hospital E cigarettes and Vaping Commercial Tobacco Use MN Dept. of Health