High-potency marijuana fails to treat mental health despite rising use

The strength of marijuana has risen sharply over the past few decades. In the 1970s, its THC content averaged around 4%, but today's products often reach 18-20%, with some containing up to 35%. Despite its growing use for mental health, evidence shows it may do more harm than good for many conditions.

Nearly a third of marijuana users in the US develop cannabis use disorder, a risk linked to higher THC levels. The drug's increased potency has made addiction more likely, particularly for those who use it regularly.

Research confirms that marijuana does not effectively treat anxiety, depression, or PTSD. It also offers no proven benefits for anorexia nervosa, bipolar disorder, OCD, or schizophrenia. Instead, established treatments like SSRIs and cognitive behavioural therapy remain the most reliable options for these conditions. Despite the lack of evidence, 27% of people aged 16-65 in the US and Canada have turned to marijuana for mental health reasons. Experts warn that regular use poses serious risks, especially for pregnant women, teenagers, and individuals with mood disorders or a family history of mental illness.

While marijuana use for mental health continues to grow, studies show it fails to treat most psychological conditions. The drug's higher potency also raises addiction risks, particularly for vulnerable groups. For now, traditional therapies and medications remain the safest and most effective choices.