The dramatic rise in lung diseases attributed to e - cigarettes in the US may have been caused by black market cannabis use . Here's what we know about the people who have been affected so far. While experts have previously suggested that the use of addictive chemical nicotine in products like Juul could be behind the crisis , the focus is increasingly shifting to unregulated products that use cannabis distillates in a liquid form . The products can be tampered with to add other ingredients , such as caffeine and alcohol , before being sold .
The dramatic rise in lung diseases attributed to e - cigarettes in the US may have been caused by black market cannabis use . While experts have previously suggested that the use of addictive chemical nicotine in products like Juul could be behind the crisis , the focus is increasingly shifting to unregulated products that use cannabis distillates in a liquid form . The products can be tampered with to add other ingredients , such as caffeine and alcohol , before being sold .