Vaping is especially harmful to individuals under the age of 25, as their brains are not yet fully developed. The chemicals found in vapes can cause problems with memory and retaining information, Do you really know what's in a vape? 7.30 Vape Flavors and Vape Juice: What You Need to Know Johns Hopkins Medicine What's REALLY in your cigarette or vape? You're not just inhaling nicotine. Cigarettes contain arsenic, ammonia, and formaldehyde yes, the same stuff used to embalm bodies. Vapes? Heavy metals, toxic chemicals,