Decaffeinated coffee is not 100% caffeine free. When coffee is being decaffeinated, 2% of the caffeine still remains in it.
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Caffeine boosts memory.
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It has been shown that caffeine causes headaches when stopped suddenly and can cause morning headaches that are relieved by a dose of caffeine.
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Chocolate is lower in caffeine than tea, coffee and coca cola. A one ounce bar of chocolate contains about 6mg of caffeine, whereas a five ounce cup of regular coffee contains over 40mg.
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You can overdose on caffeine.
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In 1943, a Pan Am Airline chef snuck whiskey into passengers' coffee to warm them up on a winter flight. When asked what kind of coffee they were being served, he improvised "Irish Coffee," creating the now-famous cocktail.
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