Coffee has very much been top of the list any time people had to burn the midnight oil, but needed something to keep them up and kill off every lure of snatching forty winks before they’re through with their night tasks.
Both students and workers have for so long trusted that drinking the popular caffeinated beverage some few hours to bedtime successfully put them in a state of induced insomnia while others caught some Zs.
But researchers at Florida Atlantic University, Harvard, Emory, and Mississippi Medical Center now claim that caffeine is actually not so potent when it comes to disrupting sleep.
According to their new study, drinking alcohol within four hours of sleep instead, is far more likely to keep you awake your than coffee.
They also established that nicotine- from smoking cigarettes and vaping- also had the ability to impede sleep, and was strongly related with insomnia than coffee, which was surprisingly found to have no significant link to sleeplessness.
In what is now the largest longitudinal studies on how alcohol, caffeine and smoking at night affects sleep, 785 African-Americans without any history of clinical sleep disorders were sampled and monitored for 14 years.
Each person was given a wrist-band sensor to monitor their sleep, as well as a journal to jot down how they slept, how they felt, and what they ate, smoked or drank every night.
Although it is acknowledged that self reports are subject to error, researchers were confident in the consistency of their findings, published in the journal, Sleep, on Tuesday.
Even after controlling for other factors which could have influence their sleep- such as their age, gender, body weight, work or school schedule, if they are depressed, anxious, stressed – caffeine still had really little impact on sleep.
Sleepless nights were routinely reported after drinking- often after happy hour drinks, but most commonly if the person drank closer to their bedtime.
Those who smoked or vaped nicotine tended to sleep, on average, 43 minutes less than their non-smoking counterparts