Humans have a kind of central clock that sets the time for the body. At first glance, it is a barely one-millimeter ball located in the hypothalamus, but these tiny molecular devices are capable of telling the time to the rest of the body.
We are diurnal animals. We are made to sleep at night and we do not eat while we sleep. We are made to eat and move during the day. So, if your body perceives that there is light at night or that you are eating, it is receiving contradictory information.
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