Cannabis and Sleep
Tim shares his evolving perspective on cannabis, particularly its impact on sleep quality. He raises intriguing questions about dosing and its potential effects on REM sleep, suggesting that even if there’s a decrease in REM percentage, faster sleep onset could lead to greater overall REM duration. Dr. Matthew highlights the lack of longitudinal studies on cannabis and REM sleep, emphasizing the need for more research to understand its long-term effects.In this clip
From this podcast

Tim Ferriss Show
Dr. Matthew Walker — All Things Sleep (Weight Gain, Alzheimer’s Disease, Caffeine, and More)
Related Questions
To what degree is REM sleep inhibited by substances like alcohol and THC, as discussed in the episode Dr. Matthew Walker: The Science & Practice of Perfecting Your Sleep | Huberman Lab Podcast #31 and the clip REM Sleep and THC?
What does he say about cannabis and its effects on sleep?
What do studies say about cannabis and sleep?