Every parent has had a day or two (or a thousand) when that extra cup of coffee is vital to keeping you awake until you tuck the kids in. But how much is too much? According to new research you can safely drink 25 cups of coffee per day.

A recent study presented at the British Cardiovascular Society’s conference found that compared to those who drank less than one cup a day, coffee drinkers who consumed anywhere from five to 25 cups a day did not have a higher risk of arterial stiffness, which can increase the risk of stroke and heart attack.

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The question is, should you drink 25 cups even if it is safe? There are other factors to keep in mind. For example, pregnant and breastfeeding women should consult with their doctors on how much caffeine intake is safe. Those with heart disease and high blood pressure should also be cautious Alice Lichtenstein, a professor at the Tufts Friedman School of Nutrition Science and Policy warned TIME.

There’s also the issue of sleep deprivation. While you might need that caffeine boost to get you through the day, it could also be keeping you awake when you finally get a few minutes for some much needed shut eye.

While most people would likely find it difficult to even consume 25 cups a day, after all that’s more than one cup an hour, the important take away is, that extra cup or two on a rough day shouldn’t cause harm.

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—Shahrzad Warkentin

 

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