Your body contains tens of trillions of cells, which means that every second you consume on the order of one hundred million trillion (1020) ATP molecules. Each time an ATP is used, it splits up into the raw materials (ADP and a phosphate), which the proton battery-powered turbines then cram back together into freshly minted, fully rejuvenated ATP molecules. These ATP molecules then hit the road again, delivering energy throughout the cell. To meet your body’s energy demands, your cellular turbines are thus astoundingly productive. Even if you’re an extremely fast reader, as you scan through
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