Health Impact of Coffee Affected By Preparation, Study Finds

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Sweden—Filtered coffee can help reduce the risk of developing type 2 diabetes, according to new research from Chalmers University of Technology and Umeå University.

Filtered coffee is the most common method of preparation in most places, notes a press release, but some people drink boiled coffee, in which coarse ground coffee is added directly to boiling water and left to brew. The reason for the difference in the effects on health? A molecule in coffee called diterpenes. Previous studies, the release notes, have shown that boiled coffee increases the risk of heart and vascular diseases, thanks to the presence of diterpenes, while filtered coffee doesn’t have these effects, and reduces the risk of type 2 diabetes.

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“When you filter coffee, the diterpenes are captured in the filter. As a result, you get the health benefits of the many other molecules present, such as different phenolic substances. In moderate amounts, caffeine also has positive effects.” Rikard Landberg, Professor in Food Science at Chalmers, and Affiliated Professor at the Department of Public Health and Clinical Medicine at Umeå University.

The release notes that other types of coffee preparation were not specifically investigated in the study, including instant, espresso, French press, and percolator coffee. Landberg stressed that preparation is not the sole determinant of health impact.

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