There was a time when getting your daily dose of caffeine meant a simple cup of coffee or tea.
Poured into a ceramic mug, the steaming liquid tended to be enough to give most people that extra burst of energy to get out the door. Back then, you'd have to drink a heck of a lot -- 81 cups of brewed coffee, or 317 cups of black tea, for the average 195-pound U.S. male -- to reach a lethal dose. So while you might still get the occasional shakiness, nausea and fast heartbeat associated with ingesting too much caffeine, you were highly unlikely to die from it.
But somewhere along the way, caffeine became an obsession, a need for many Americans; and an entire industry sprang up to try to make caffeine ingesting more efficient.
table showing daily caffeine intake by age for Americans |
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http://www.washingtonpost.com/news/to-your-health/wp/2015/09/02/how-americas-love-affair-with-caffeine-has-sparked-a-crisis-of-overdoses-and-what-the-fda-is-trying-to-do-about-it/
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