Consumers should also be warned against vaping other unregulated compounds such as synthetic or semi-synthetic cannabinoids. For example, in a very similar experimental setup to this study, Munger et al. were recently able to show that vaping of ∆ 8 -THC may form the toxic compound ketene that had been associated as underlying mechanism for the cause of e-cigarette associated lung injury (EVALI) as it may also be formed from vitamin E acetate, which had been contained in CBD e-liquids . These consideration that EVALI was not caused by cannabinoids but other compounds in the e-cigarette liquids was recently validated by a risk assessment of inhaled CBD and THC, which found that the intake would be typically below thresholds of toxicity . Nevertheless, the it was also remarked that the available data for risk assessment of CBD is rather limited.