Long-term marijuana use causes lasting psychological and physical effects
the verdict
SUPPORTED
the evidence backs this
confidence 77/100
Multiple recent studies and reviews indicate that long-term and contemporary marijuana use is associated with lasting mental health vulnerabilities, respiratory and physiological impacts, cannabis use disorder, and neurodevelopmental alterations.
Evidence for · 11
Health impacts of cannabis: focus on smoking vs. vaping effects on the respiratory and cardiovascular systems.
2026 · cited by 1
Paper [0] discusses physiological impacts and respiratory symptoms linked to cannabis use, though notes long-term comparative data on vaping is still emerging.
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More for · 10
Cannabis use and its impact on respiratory physiology and lung cancer risk: Mechanistic and epidemiological insights (Review).
2025 · cited by 1
Paper [1] associates chronic cannabis smoking with respiratory symptoms, airflow obstruction, and impaired immune function.
Cannabis Use in Adolescents.
2025 · cited by 1
Paper [2] links adolescent cannabis use to adverse outcomes in brain development, mental health, and physical health across multiple body systems.
Mental health consequences of contemporary cannabis use in Europe: potency, patterns of use, and health system context.
2026 · cited by 0
Paper [3] connects high-potency cannabis use to elevated risks of psychosis, anxiety, and cannabis use disorder.
Cannabis and Mental Health: A Review.
2026 · cited by 0
Paper [4] outlines substantial risks of adverse mental health effects, including psychosis, cannabis use disorder, and mood disorder symptom worsening from THC-predominant cannabis.
Medical Cannabis Legalization and its Association with Cannabis use, Cannabis use Disorder, and Intoxicated Driving: Findings from the National Survey on Drug use and Health, 2016-2019.
2026 · cited by 0
Paper [5] associates state medical cannabis legalization with increased rates of cannabis use disorder and impaired driving.
How adolescent cannabis use reshapes the developing brain - a systematic review.
2026 · cited by 0
Paper [6] finds that adolescent cannabis use is associated with structural brain changes, cognitive effects, and elevated addiction risk.
Cannabis Use Disorder in the Era of Legalization: Implications for Addiction Treatment Systems.
2026 · cited by 0
Paper [7] examines cannabis use disorder as a key construct linking exposure to sustained, chronic clinical impairment.
Longitudinal Transitions Between Internalizing and Externalizing Symptoms and Associations with Substance Use among US Young Adults, 2016-2023.
2026 · cited by 0
Paper [8] associates cannabis use with longitudinal transitions toward internalizing and externalizing mental health symptoms.
Cannabis Expectancies as a Mediator in the Relationship Between Cannabis Use and Psychiatric Symptoms in Women With Post-traumatic Stress Disorder (PTSD) Symptoms.
2026 · cited by 0
Paper [9] finds that longer cannabis use histories correlate with higher positive expectancies alongside higher levels of anxiety and depression in vulnerable populations.
Current marijuana use is cross-sectionally associated with accelerated biological aging among U.S. adults: exploring mediating effect of blood cadmium.
2026 · cited by 0
Paper [10] provides epidemiological evidence linking current marijuana use to accelerated biological aging.