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5. You can’t fall asleep
Insomnia is another obvious sign of drinking way too much coffee. According to the American Academy of Sleep Medicine, caffeine gives us an energy boost for approximately six hours, so it’s a good idea to steer clear of coffee after lunch.
However, being unable to sleep has many root causes. For instance, it could be a sign of a magnesium deficiency. There are many medical reasons why you can’t fall asleep. Try to determine yours in order to solve the problem.