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Caffeine energy drinks 'intensify heart contractions'
http://www.bbc.co.uk/news/health-25156509
Energy drinks packed with caffeine can change the way the heart beats, researchers warn.
The team from the University of Bonn in Germany imaged the hearts of 17 people an hour after they had an energy drink.
The study showed contractions were more forceful after the drink.
The team told the annual meeting of the Radiological Society of North America that children and people with some health conditions should avoid the drinks.
