Marijuana’s oft-vaunted prowess as a sleep aid could be taken down a notch with new Canadian research that suggests cannabis may result in shorter and longer sleep than the optimal period of six to nine hours.
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Calling research into marijuana’s impact on sleep-wake regulation inconclusive — despite both recreational and medicinal cannabis often being used as a sleep aid — investigators at the University of Toronto sought to pin down the relationship between cannabis use and nightly sleep duration.
They point out that “only two-thirds of Americans get the recommended seven to nine hours of sleep every night, and almost half report daytime sleepiness every
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