Adults who use cannabis in several different forms appear to be at greater risk of addiction than those who stick to one, according to a new study that tracked patterns of use across a large group of Americans. Researchers found that mixing consumption methods may serve as an early warning sign that a person's use has become harder to control.
The study examined cannabis use among more than 17,700 adults in the United States, looking not only at how often people used the drug but also at the forms they chose, such as smoked flower, vaping, edibles and other products. Participants who used several forms reported much higher rates of daily use than people who relied on fewer methods. They also reported more symptoms associated with addiction.
The clearest contrast came when the researchers compared groups by their main method of use. About 67 percent of people who used nearly every available form met the study's criteria for cannabis use disorder. By comparison, only about 15 percent of people who mainly used edibles met those criteria. The gap suggests that the number of ways a person consumes cannabis may matter as much as the amount they consume.
The researchers stressed the limits of their findings. The study shows an association between using many forms and addiction symptoms, but it does not establish that one causes the other. It also does not explain why people who mix methods tend to show higher risk, leaving that question open for future work. Still, the results point to a simple signal that clinicians and public health officials could consider when assessing patients who use cannabis.
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