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Effects on heart rate

This article was originally published in The Tan Sheet

Executive Summary

Energy drinks, most of which contain high levels of caffeine and amino acid taurine, increase blood pressure and heart-rate levels, according to results of Wayne State (Mich.) University research. Over the duration of the study, subjects' heart rates increased five to seven beats per minute and systolic blood pressure increased 10 mmHg. "Individuals with high blood pressure and heart disease should be advised to avoid these drinks," says James Kalus, pharmacist and senior manager of patient care services at Henry Ford Hospital in Detroit. While the product used in the study had as much caffeine as one to two cups of coffee, others contain "much higher levels," said Kalus. Researchers are unsure what effect exercise or combining the products with alcohol has on users, but several state attorneys general concerned with health claims in alcoholic-energy-drink advertising are calling for greater federal enforcement against the practice (1"The Tan Sheet" Sept. 3, 2007, p. 14)...

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