Cannabis Use and the Adult Brain

By age 30, brain development is complete, especially in the prefrontal cortex — the part that controls judgment and decision-making. This is why occasional cannabis use at this age has fewer risks compared to teenage use.

Still, chronic heavy use can impact attention and working memory. A 2022 study in JAMA Psychiatry reported small but measurable differences in cognitive scores among daily users. While not severe, this finding suggests that moderation remains important.

Mental Health Considerations

Cannabis can relax some users, but high doses of THC are known to trigger short-term anxiety, paranoia, or rapid