Which of these will give you the worst night's sleep: caffeine, alcohol or nicotine?
So says a new study published in the journal Sleep, which analyzed data from 785 African American men and women. And while nicotine and alcohol use four hours before bedtime were both associated with worse sleep — even after controlling for factors like age, gender and BMI — caffeine was not.
“There is no reason to think that these findings are not generalizable to other racial or ethnic groups,” she said. “This is one of the largest investigations of the impact of alcohol, caffeine and nicotine to date with more than 5,000 nights of data.” And good news for coffee and tea lovers: consuming caffeine in the hours before going to bed did not have any impact on how long it took the subjects to fall asleep, how long they slept, or whether they woke up during the night. Despite often repeated recommendations not to consume any caffeine in the hours before going to bed, caffeine affects different people in different ways.
The researchers wrote that this stems from nicotine being a stimulant, as well as the body undergoing nicotine withdrawal while a person sleeps, which disrupts their rest. Previous research has also associated nicotine use with trouble falling asleep, lighter sleep, higher rates of obstructive sleep apnea and sleeping for a shorter length of time compared to those who don’t use it.
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