New research from Australia suggests that adults who keep smoking weed into their 30s may see poorer life outcomes. In a University of Queensland study, long-term users over 30 tended to score lower on education, income, home ownership, relationship stability, and reported happiness—effects not seen with purely youthful, experimental use.

However, the findings have caveats. The dataset was narrow (a localized cohort of mothers, with some data dating back to 1981), which limits how widely the results apply today. What counts as “success” was also subjective—owning a home or being partnered isn’t everyone’s goal.

The study also couldn’t fully separate cannabis from other substances, leaving open the possibility that polydrug use influenced the negative outcomes. So, it’s a signal—not a final verdict—about weed and midlife success.

Practical takeaway: use mindfully. Track motivation, job performance, spending, and relationship health. If cannabis starts undermining responsibilities or well-being, consider cutting back or quitting. Moderation and self-awareness matter more than a blanket yes or no.