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How much coffee is too much coffee?
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Written and Illustrated by Dwayne Godwin and Jorge Cham
Animated by Jorge Cham
Narrated by Meg Rosenburg
Comic originally published in Scientific American Mind

NOTES: It would be hard - maybe impossible - to OD on coffee. You'd likely vomit before a toxic level was reached. But the equivalent caffeine from pills has been fatal. Caffeine pills cause most caffeine-related ER deaths because of what they do to your heart. Some links:

http://www.huffingtonpost.com/kristin...
http://iospress.metapress.com/content...
http://www.newswise.com/articles/mode...
http://www.nejm.org/doi/full/10.1056/...