After reading all the previous articles, it seems the question should by why do we stay awake?
Biologically it seems we stay awake to eat and do the other activities that are needed to allow us to procreate and raise the next
generation to pass on our genes.
When we are hungry, a cell in our brain releases a chemical orexins (plus who knows what else) that keeps us alert so we can get
food.
Sugar blocks those cells from producing orexins. Apparently without the chemical to keep us awake, we get sleepy.
Avoid sugar and stay hungry if you want to stay alert.
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