Vaping, Smoking and Lead Poisoning Vaping Information Substance Use Prevention Services Youth Services System, Inc. Youth Services System, Inc. what is in vape juice What is in a vape? Vaping Post What Is An Electronic Cigarette? TECC Vape water vapor. What e cigarettes actually release is aerosol packed with harmful substances: nicotine that hooks you, formaldehyde linked to cancer, toxic metals like lead and nickel, and chemicals that irritate