Cannabis May Harm Sleep, New Study Warns

Millions of people turn to cannabis hoping for better sleep, but recent research indicates this widely held belief may be misguided. A comprehensive study by Northwestern University, analyzing data from nearly 1,300 participants over three decades, found that cannabis users often experience poorer sleep quality than they perceive.

While participants using cannabis did not report sleeping worse, objective data from sleep-tracking devices revealed a different story. These devices indicated more frequent nighttime awakenings and disruptions for cannabis users. Researchers suggest these "micro-awakenings" might go unnoticed by users, leading to a false sense of adequate sleep.

The study's findings align with some previous research, though the field has mixed results. Some smaller studies, sometimes funded by cannabis companies, have suggested benefits for specific compounds like CBN for certain sleep-disordered individuals. However, a recent systematic review found little meaningful effect of medical cannabis on sleep quality compared to placebo.

Scientists emphasize that the research is observational and cannot definitively prove causation, noting that individuals with pre-existing sleep issues might be more inclined to use cannabis. Further research is needed to explore the effects of different cannabis strains and consumption methods.