The caffeine content in the morning boost productivity, so coffee drinkers are probably more motivated to get up than those who don’t, suggests a new study.
A team led by neuroscientist and PhD student Andrew T. Sacks of the University of New South Wales (UNSW) found the caffeine-rich brews were more effective than regular coffee and had a higher energy, focus and memory effects.
The findings, published in the journal Brain, are the latest evidence that caffeine has important roles in cognitive function, says Dr Sacks.
“It seems that when we drink caffeine, we’re making ourselves more productive,” he says.
“The more we drink it, the more we make ourselves smarter.”
The team studied 38 people aged between 18 and 35 who drank a daily dose of 400 milligrams of caffeine.
“They found that when they were asked to perform tasks, they were more likely to do so than those without caffeine,” Dr Sack says.
In a separate study, a similar group of 35 people drank a single cup of coffee a day.
Both the caffeine and the coffee-related benefits were found after a single test session.
But the caffeine effects lasted longer than those of regular coffee, suggesting it’s a bit more powerful, says Professor Tamsin Loughran of the Australian National University.
“You can make the same amount of caffeine and not have any impact on cognition, whereas if you drink coffee, you get a lot of benefits,” he explains.
The team also found that the caffeine helped people to stay awake more often.
“We found that people were better at staying awake than those not getting any caffeine,” says Dr Loughrans.
“People with caffeine were more awake, and also were more productive.”
“People are more likely than not to feel more energetic, less fatigued, and more engaged during the day” The findings were not only positive, but also pointed towards a potential mechanism.
“If you can reduce the amount of coffee consumed during the evening, you can also reduce your caffeine intake during the night,” says Professor Loughans.
“For some people, this could be beneficial in terms of reducing fatigue and reducing anxiety,” he adds.
The research was supported by the National Health and Medical Research Council of Australia.
Follow @BBCNewsMagazine on Twitter and on Facebook.