Cannabis use can lead to the development of a substance use disorder, a medical illness in which the person is unable to stop using even though it's causing health and social problems in their life. Research suggests that between 9-30% of those who use cannabis may develop some degree of marijuana use disorder. People who begin using cannabis before age 18 are four to seven times more likely than adults to develop a marijuana use disorder.

It’s important to note that, “high potency” cannabis is considered to be anything over 10% THC. Use of high potency cannabis is associated with a number of outcomes, including greater risk of cannabis use disorder and adverse mental health outcomes.

Source: National Institute on Drug Abuse