Cannabis, also known as marijuana or weed, is one
of the most widely used psychoactive substances in the world. Many people consume it for relaxation, stress relief, or medical reasons. However, a growing number of users struggle with cannabis addiction — also called Cannabis Use Disorder. But why do some people become dependent while others don’t?
A new scientific study sheds light on this question. Researchers found that cannabis addiction is linked to changes in the brain’s reward system, especially areas responsible for pleasure and motivation. When cannabis is used frequently, the brain produces less dopamine — the “feel-good” chemical — on its own. As a result, users begin to rely on cannabis to experience happiness or calmness, leading to psychological dependence.
Genetics also play a major role. According to the study, people with certain genetic variations are more likely to develop addiction to THC, the main psychoactive compound in cannabis. Stress, anxiety, and depression are additional risk factors. Many users turn to cannabis as a coping mechanism, but long-term use can actually worsen mental health, creating a harmful cycle.
With the rise of cannabis legalization in countries like the United States and Canada, addiction cases are increasing—especially among young adults. High-potency cannabis products such as edibles and vaping oils make the problem worse by delivering stronger doses of THC.
While cannabis is often perceived as “safe” or “natural,” experts warn that heavy use can lead to memory loss, low motivation, sleep problems, and social withdrawal. The good news is that treatment is possible through therapy, support groups, and lifestyle changes.
Understanding why people get addicted to cannabis is the first step in preventing abuse. As research continues, it becomes clear that cannabis may be helpful for some—but risky for many.