Marijuana is slowly becoming more accepted around the world — whether it’s for medical use, anxiety, or just recreation. But a recent Australian study is raising red flags about marijuana use in adults over the age of 30.
Researchers from the University of Queensland analyzed data from over 8,000 mothers and 2,000 children regarding drug use at ages 21 and 30. The study found that people who continued smoking marijuana into their 30s showed significantly lower “life success” based on nine markers:
- Education
- Income
- Home ownership
- Relationship status
- Reported happiness
The key takeaway? These negative outcomes were only seen in those who continued smoking after the age of 30.
Study Limitations
- Limited sample – The data focused exclusively on Australian women, with some records dating back to 1981. This may not reflect modern global trends or demographics.
- Success is subjective – Metrics like home ownership or relationship status vary widely across cultures and lifestyles. A digital nomad without a house isn’t necessarily a failure.
- Unclear drug overlap – The study did not account for use of other substances (like ecstasy or opioids), which may have skewed results.
So What Does It Mean for You?
Using marijuana occasionally in your youth doesn’t doom you. But relying on it regularly after 30 might interfere with your job, relationships, and daily life. If you notice your motivation or finances suffering — it might be time to rethink the habit.