How does Adenosine work and why does it make you feel the way it does?
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Adenosine is what is left when you use all the phosphates from ATP (energy). It is used as a way the body can monitor energy levels: high adenosine means low energy and so your body goes into “low battery mode”.
Interestingly, caffeine works by blocking the receptor adenosine binds to, preventing your body from detecting low energy levels (high adenosine) and tricking it into thinking you are not tired.
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