Stein cites a figure that “roughly 3 in 10 cannabis users develop some degree of cannabis use disorder,” with risk rising for daily use and for people who start before 18 (1 in 6, by her count). That’s not fabricated. It lines up reasonably well with NIDA-adjacent research and with the JAMA Psychiatry study I wrote about elsewhere this week, showing rising CUD rates as today’s products get more potent.