Companies have rallied against vaping in the past, and now a study is claiming that vaping THC could actually be worse for your health than smoking cigarettes, vaping nicotine, or smoking weed.

The study was conducted by the University of Michigan, and research noted that people from the ages of 12 to 17 have a higher chance of developing lung injuries like wheezing or a dry cough as a result of vaping THC. The co-director for University of Michigan’s Center for the Study of Drugs, Alcohol, Smoking, and Health—Carol Boyd, said:

“We found, and it was something that surprised us a bit, that it was the lifetime vaping cannabis that was associated with a far greater number of symptoms and a higher likelihood of having each of these symptoms than using either e-cigarettes or cigarettes. I think that industry would probably like to show that vaping e-cigarettes is healthier, that it’s the cannabis vaping causing these respiratory symptoms, not the e-cigarettes. This is not true. E-cigarette vaping also causes symptoms among youth. However, in our study, and when we took into account their e-cigarette use, we found higher odds of having these respiratory symptoms among youth who had vaped cannabis. It was noted that in the past, Vitamin E acetate was linked to lung illnesses and deaths related to vaping THC before the pandemic. Vitamin E acetate is reportedly “used as a cutting agent in e-liquids containing THC.”