Teen Marijuana Vaping Raises Concerns

A new study gives the first U.S. estimates of teen and preteen vaping of marijuana — and the rates are relatively high. The findings raise concerns about addiction and other long-term health risks, researchers say.

E-cigarettes are battery-powered devices that vaporize liquids. Most e-liquids contain nicotine. That’s the chemical that makes tobacco addictive. But the devices also can vaporize dried marijuana leaves or buds. Or they can use oils or waxes made from the plant’s main active ingredient, THC. That’s short for tetrahydrocannabinol.