Fast Five Quiz: Caffeine Facts vs Fiction

Mary L. Windle, PharmD


September 04, 2019

A recent study found that consumption of just one caffeine-containing energy drink has been associated with significant impairment in endothelial function in young, healthy adults. Researchers found an approximate 50% reduction in the arteries' ability to dilate.

A large observational study found a significant inverse relationship between consuming coffee and all-cause mortality among patients with chronic kidney disease. Data on nearly 5000 patients were analyzed, and caffeine consumption was associated with an approximate 25% reduction in risk. However, increasing caffeine consumption was not associated with increased benefit.

A study published in JAMA Dermatology found that caffeine does not promote rosacea. In fact, a higher intake of caffeinated coffee was associated with a reduced risk of developing rosacea. The absolute risk for incident rosacea fell by 132 per 100,000 person-years for the highest versus lowest quintile of caffeine intake. A 23% reduction in risk was observed with at least four servings of coffee per day.

A study published in Neurology found that caffeine given at the dose equivalent of three cups of coffee a day did not improve motor symptoms in patients with Parkinson disease. The randomized, controlled trial found that caffeine does not offer significant benefit as a symptomatic treatment for Parkinson disease.

Read more about the physical effects of caffeine.


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