I work overnight shifts (11pm-7am) and take caffeine pills to stay awake. When I get home, even if I take more caffeine I’m sometimes still too tired and fall asleep. Why does it eventually stop working? Is there some sort of chemical limit? Why can’t caffeine replace sleep for longer periods of time (like days on end)?
In: 595
Caffeine basically blocks the receptors that tell you that you need to sleep
When you actually sleep, a lot of things happen including your brain being washed. Fluid comes in and washes the old fluid out. This is a very simple explanation and it’s far more detailed
Your muscles also relax and helps in repairing them
This is something caffeine cannot reproduce
Latest Answers