BOCA RATON, Florida (WPVI) -- Going to bed after a nightcap and a final smoke may harm your sleep.
After tracking the sleep habits of nearly 800 African American volunteers, a team at Florida Atlantic University concluded that a drink within 4 hours of bedtime cuts the time asleep by 1 percent and nicotine cut it by 1.74 percent more.
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Interestingly, caffeine didn't affect sleep significantly.
Researchers didn't study the effects of vaping, but believe the effects are the same, since those use liquid nicotine pods.
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Results of the study are published in the journal Sleep.