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While this much caffeine has no effect on myocardial blood flow when a body is at rest, it has a significant effect when you work out. Healthy bike riders experienced a 14 to 22 percent drop in myocardial blood flow; those with coronary artery disease experienced an 18 to 25 percent drop.

[…] That starves the heart muscles of oxygen, which can lead to outcomes like chest pain, myocardial ischemia, or even myocardial infarction — a heart attack.

Obligatorisk läsning för de som kombinerar energidrycker och löprundor.