![]() ![]() Why it causes headaches: withdrawal symptoms. Here’s another caffeine oxymoron for you: It can be both the cause of, and a temporary pain reliever for, headaches. Why can caffeine cause headaches - but also sometimes alleviate them? So much for the energy boost you were looking for. Meaning it rids your body of water, and makes you need to use the bathroom more, which can cause dehydration…and can also make you sleepy. Read: taking a nap (if you’re able) instead of downing that 3pm cup of joe might be a better and more effective alternative to boost your energy levels.Īnother reason why caffeine might make you feel tired: dehydration. The only real way to stop feeling sleepy, with or without caffeine? Getting more sleep. Along with your need to sleep (altogether what scientists call "sleep pressure.”) Then when the caffeine effects wear off, all the built-up sleep pressure is still there. Which gives you that feeling of alertness.īut, plot twist: that doesn’t actually stop adenosine from being produced. So when you drink coffee or an energy drink, the caffeine temporarily blocks adenosine from doing its job (read: making you sleepy). And the cycle repeats itself each day.Įnter: Caffeine, which has a similar structure to adenosine. ![]() The amount of adenosine in the body increases the longer you stay awake (causing you to feel tired) and decreases while you sleep. ![]() Which brings us to… Why does caffeine make me tired?įirst, a quick bio lesson: Feeling sleepy, in general, is caused in large part by adenosine - a chemical that helps regulate our sleep-wake cycle. ![]()
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