Delta-8 THC vape cartridges are popular precisely because they re unregulated and untested. That could be a big problem for your health. (Illustration: Joshua Titus / Leafly) Delta-8 THC products have exploded in popularity in the past year, especially in states that haven’t yet legalized the adult use of cannabis. Illicit delta-8 THC vape cartridges may be setting America up for another VAPI lung crisis. The legal status of delta-8 continues to evolve (more on that here), but there’s a question consumers should ask before considering delta-8’s legality: Is it safe to consume? Nearly all delta-8 THC products are sold outside of state-licensed and state-regulated cannabis industries. In that unregulated space, there are no rules to prevent bad actors from making and selling potentially toxic products.