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Cannabis Destroys Sleep Quality
Neuroscience News • • health
Key Points:
- A 35-year longitudinal study from the CARDIA cohort found that both lifetime and recent cannabis use are linked to poorer objectively measured sleep quality in middle-aged adults, including lower sleep efficiency, increased fragmentation, and longer wakefulness after sleep onset.
- Despite these measurable disruptions detected by wrist actigraphy, cannabis users did not report worse sleep quality subjectively, indicating a disconnect between perceived and actual sleep impairment.
- The associations between cannabis use and impaired sleep persisted after controlling for multiple confounders such as age, sex, race, alcohol, nicotine, physical activity, depression, and other substance use.
- The study challenges the common belief that cannabis aids sleep, suggesting instead that long-term cannabis exposure may degrade sleep architecture without users' awareness.
- Researchers recommend evidence-based behavioral interventions for sleep problems over cannabis use and plan to investigate how different cannabinoid formulations and administration methods affect sleep in future studies.
