https://www.sciencedaily.com/releases/2019/11/191126140423.htm > Portland State University Chemistry Professor Rob Strongin led a research team to study what happens when additives are put into vaping products. Specifically, they studied the chemical reaction that takes place when cannabis is consumed using a vape pen or dab rig. The study, "Aerosol Gas-Phase Components from Cannabis E-Cigarettes and Dabbing: Mechanistic Insight and Quantitative Risk Analysis," was published in the September issue of ACS Omega. > "What's inhaled is actually different than what's listed in the ingredients," Strongin said.