),can keep you up later than you’d likeor contribute to restless sleep.
Some people can go till early afternoon."
It can make you anxious
Another side effect of caffeine releasing your body’s adrenaline is anxiety.
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Caffeine increases your alertness by blocking the effects of adenosine, a brain chemical that makes you feel tired.
It can increase your heart rate
This one is pretty scary!
Too much caffeine may cause your heart to beat faster, or even alter your heartbeat rhythm.
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It can be a memory booster
A University of California study found thatdrinking two espressos enhanced memoryconsolidation.
This then improved long-term memory in the subjects.
Don’t overdo it
The way to avoid these drawbacks to espresso is pretty simple.
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you might have too much of a good thing, says Young.
“Many people who are healthy can drink up to 400 milligrams ofcaffeine a day.
That’s around four cups of brewed coffee or 5-6 espressos,” she explains.
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