U M study: Marijuana vapes increasingly popular among teens Bridge Michigan Concern is growing about synthetic cannabinoids found in THC vapes stronger, riskier, and unpredictable. These substances sometimes called fake weed have been linked to seizures, paranoia and even California recalls cannabis vape months after it was told of contamination Los Angeles Times Cannabis vapes disguised as pens, lip balm, even airpod cases ABC News Disposable Vape Pens: Convenient And Ready to Use Elemental Wellness Cannabis Dispensary San Jose Cannabis vapes to hit P.E.I. shelves soon but officials warn of risks