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Some coffee drinkers develop tolerance for caffeine

Source: Yahoo
Caffeine's blood pressure effect persists in some .

Source: Journal of Hypertension
Blood pressure response to chronic intake of coffee and caffeine: a meta-analysis of randomized controlled trials.

Source: Mayo Clinic
How does Caffeine affect my blood pressure?

Other sources: Reuters , Prevent Disease , Medline Plus

Our Summary

"My advice would be for individuals who have high blood pressure -- and particularly if their blood pressure is not easily controlled with medication -- to limit their caffeine intake," Dr. N. H. Farag, a researcher at the VA Medical Center and University of Oklahoma Health Sciences Center in Oklahoma City, told Reuters Health.

Reuters Health reports:  "There is no easy way for people to tell whether they have high or low caffeine tolerance; systematic monitoring of a person's blood pressure response to various caffeine doses is the only route, according to Farag. "

The common message for high blood pressure sufferers from the research is limit caffeine intake and focus on getting regular exercise and eating a healthy diet.

I will make sure Steve sees this story ... he loves his coffee, although I suspect he has a high caffeine tolerance.

Steve's note: I have taken many readings soon after having a cup of coffee, and I have never noticed an increase from my normal readings.

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