The study, called Monitoring the Future, was released Thursday by the National Institute on Drug Abuse and the University of Michigan. It surveyed more than 43,000 eighth, 10th and 12th graders across the country in early 2017 about their use of drugs and other substances in the past year.
Students were also asked about the substances they consumed when they vaped. Flavoring, or filling the devices with flavored “e-liquid” that does not contain nicotine, was the most common, but some teens noted they didn’t always know what was in the device, said Volkow. Others reported vaping nicotine and marijuana.
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