Caffeine Could Spell Trouble for Diabetics

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What to do? Keep coffee consumption under control, Lane suggested. "It would be worthwhile for people with diabetes who drink coffee to try quitting for a time and see if their glucose improves," Lane said. "It's a simple thing that might make their diabetes better."

Decaf may also do the trick. Indeed, van Dam said a previous study showed decaffeinated coffee actually reduced spikes in glucose levels after people ate sugary food. "It may thus be useful for persons with diabetes to try switching from caffeinated to decaffeinated coffee and see whether this improves their glycemic control, he said.

More information

Learn more about diabetes from the National Institutes of Health.