Over the past 10 years, research has shown that coffee doesn’t necessarily cause , but a new has found that a cup of Joe may actually keep us just as well as water does.

In the study, participants drank about 27 ounces of coffee per day for three days in a row. (For reference, a is 20 ounces, a is 16, and a is 12.) Then they drank the same amount of water for three consecutive days. Controlling for physical activity and food and fluid intake, the researchers compared a wide range of (body weight, total amount of water in the body, kidney function, urine volume, and blood values) and found no significant difference in subjects’ hydration status when they were drinking coffee versus water. Although the study population is small and specific — 50 adult men who were habitual coffee-drinkers and were told not to exercise during the study — its findings echo similar previously-collected data regarding the relationship between caffeine consumption and hydration.

A 2002 review of 10 different studies concluded that even when consumed in larger amounts caffeine caused no detrimental effects on hydration status or even athletic performance . Armstrong, LE. International Journal of Sport Nutrition and Exercise Metabolism. 2002 Jun;12(2):189-206.. A few years later, in 2005, researchers found that consuming small amounts of caffeine did not impact hydration status . Armstrong LE, Pumerantz AC, Roti MW, et al. International Journal of Sport Nutrition and Exercise Metabolism. 2005 Jun;15(3):252-65..

Considering coffee’s hydrating qualities, not to mention its ability to increase metabolism, enhance , and , I think I’ll make my next cup bottomless . Acheson KJ, Zahorska-Markiewicz B, Pittet P, et al. The American Journal of Clinical Nutrition, 1980 May;33(5):989-97 . Borota D, Murray E, Keceli G, et al. Nature Neuroscience, 2014 Jan 12 . Lopez-Garcia E, van Dam RM, Li TY, et al. Annals of Internal Medicine, 2008 Jun 17;148(12):904-14..

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