Energy drinks contain up to five times more caffeine than
coffee, but the boost they provide is fleeting and comes with unpleasant side
effects like nervousness, irritability, and rapid heartbeat, says Goodson.
Plus, energy drinks often contain high levels of taurine, a central nervous
system stimulant, and upwards of 50 grams of sugar per can (that's 13 teaspoons
worth!). The sweet stuff spikes blood sugar temporarily, only to crash soon
after, leaving you sluggish and foggy headed—and reaching for another energy
drink.
source:health
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