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A member asked:
When we feel tired, is there a certain fatigue hormone that signals the brain you are "tired"?
A doctor has provided 1 answer
There are many: Tiredness is controlled by multiple brain chemicals. Some chemicals make us more awake (like adrenaline) others cause us to be sleepy. A delicate balance allows us to be awake during the day and sleep at night. So no, there is not 1 fatigue chemical but there are numerous chemicals.
Answered 10/3/2016
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