I rarely smoke weed anymore ..once in a while I'll take a hit (2 at most) from friends at work, but not a regular thing ... Some people here have those "pens" with the THC oil cartridges, which are really potent ...It's my understanding that it's those (bootleg) cartridges that are being tampered with and causing lung damage to the users
...I'm guessing in states where they're sold legally (in stores) they're far less likely to be tampered with ...black market dealers always find a way to cut their product to make more money and give nadda shit about the health risks of whatever they cut it with .. You'd think Vitamin E would be harmless enough but who knows what it could do to your lungs when heated to a vapor and inhaled