Some people drank up to 25 cups a day in the latter group, although the average number for people in this group was five cups a day.
Over 8,000 people in the United Kingdom took part in the study, which looked to test theories that drinking coffee could make arteries more stiff, making the heart work harder and increasing the odds of a heart attack or stroke.
Arteries' job is to carry blood containing oxygen and nutrients from our hearts to the rest of our bodies.
Researchers found that even those drinking up to 25 cups a day were no more likely to have stiffened arteries than those who drank less than one cup.
Coffee fans have been getting mixed messages about their favorite drink for years, including previous studies that suggest coffee is bad for your heart.
Analyzing more than 8,000 people in the United Kingdom, the study divided people into three groups depending on their coffee consumption. And if you think that's a lot of coffee, participants who were drinking more than 25 cups per day were excluded from taking part.
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"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".
Previous studies have suggested that high coffee intake could increase the risk of having a heart attack or a stroke due to stiffening of the arteries.
"The main message for people to take away from this is that coffee can be enjoyed as part of a healthy lifestyle, and coffee lovers can be reassured by this result in terms of blood vessel stiffness outcomes", Fung said.
After water and tea, coffee is the most consumed beverage in the world - so it's also one of the most studied.
Of the 8,412 participants who underwent MRI heart scans and infrared pulse wave tests, the research showed moderate and heavy coffee drinkers were most likely to be men who smoked and regularly drank alcohol. This is because all of these reasons can create arterial stiffness without coffee drinking.
The Associate Medical Director at the British Heart Foundation, Professor Metin Avkiran, said that "Understanding the impact that coffee has on our heart and circulatory system is something that researchers and the media have had brewing for some time". "This research will hopefully put some of the media reports in perspective, as it rules out one of the potentially detrimental effects of coffee on our arteries".