If you can't function in the morning before several cups of coffee but worry about the effect it may be having on your health, a new study suggests there's no need to be concerned.
Coffee lovers have often been warned to cut down their consumption, but this new study says even those who drink up to 25 cups of joe don't need to fret over the impact it's having on their heart.
Previous studies have suggested coffee stiffens arteries, which in turn puts pressure on the heart and increases the chances of a stroke of heart attack.
But this new study of over 8,000 people across the UK found that those who drank five cups a day - some up to 25 - was no worse for their arteries than those who might not even have one coffee a day.
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Part-funded by the British Heart Foundation, the research was presented at the British Cardiovascular Society conference in Manchester.
A total of 8,412 people were divided into three different groups for the research by experts at Queen Mary University, London.
The first group was composed of those who consume less than one cup of coffee per day, the second was made up of those who drink between two and three, and the final was for those who drink more than three cups of java.
Included in the latter group were some who even drank up to 25 cups every day, but the average for this division worked out at five.
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Researchers found that those who were chugging their way through a cup of coffee an hour were no more likely to have stiffening of arteries than those who drank less than a cup a day.
Participants underwent MRI heart scans and infrared pulse wave tests for the research.
The results even held true when factors like smoking status, weight and age were taken into account.
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"Despite the huge popularity of coffee worldwide, different reports could put people off from enjoying it," said Dr Kenneth Fung of the results. "Whilst we can't prove a causal link in this study, our research indicates coffee isn't as bad for the arteries as previous studies would suggest.
The scientist continued: "Although our study included individuals who drink up to 25 cups a day, the average intake amongst the highest coffee consumption group was five cups a day.
"We would like to study these people more closely in our future work so that we can help to advise safe limits."
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Professor Metin Avkiran, associate medical director at the British Heart Foundation, added that the study "rules out one of the potential detrimental effects of coffee on our arteries".
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