![]() Things such as how much water you’re drinking or when you last ate can also influence your reaction to caffeine after it’s worn off. The effect on sleep also varies.Īnd other factors come into play too. Individuals have different tolerances for caffeine which can affect their initial reaction and how they feel afterward. If you feel tired after a cup of coffee, you may be surprised to learn that some people don’t react in the same way. Your central nervous system will likely still experience some stimulation from caffeine. If you’re a regular coffee drinker, your body will develop some tolerance to its effects. However, not everyone reacts to its effects as intensely or feels tired after drinking coffee. You’ll continue to feel the so-called caffeine high up to four hours after that first cup of coffee though it may last longer in pregnant women. It doesn’t take long for caffeine to get to work because you’ll begin to feel its effects within 45 minutes. Now that it’s in high gear, your brain is going to demand more fuel. Despite its small size, your brain uses about 20 percent of your body’s glucose supplies. The rush of blood sugar or glucose will give your brain the added boost it needs. That’s one reason why athletes may use it as a stimulant for performance. The overall effect is increased alertness, better thinking, and improved coordination. In addition to the previous reactions, caffeine affects most other parts of your brain. That leads to multiple reactions in your body. That effect, in turn, causes a release of more chemicals called norepinephrine and epinephrine. Second, It also interferes with a reaction that breaks down another chemical called messenger cyclic adenosine monophosphate (cAMP). With the added oxygen, your body can produce energy quickly and more efficiently using carbs and sugar as sources. Your metabolism will also increase because your muscles are going to need a ready source of fuel in order to react. Your body normally releases these chemicals in fight-or-flight situations so that you can respond fast to threats, real or not. That’s why drinking coffee feels good.įirst, these neurotransmitters will cause your heart to beat faster and more forcefully, delivering more oxygen to your muscles. It stimulates the release of dopamine in your brain which is a chemical called a neurotransmitter that controls its pleasure center. How Does Caffeine Affects Your Body?Ĭaffeine targets several areas in your body including your brain, central nervous system (CNS), heart, and muscles. ![]() ![]() The answer lies not with the caffeine not working but rather its effects on your body that make you feel tired after coffee. Coffee Guides Sleepy After Coffee – Why Does Caffeine Make Me Tired?ĭo you find that you feel even more sleepy after drinking a caffeinated beverage? If that sounds like you, it’s entirely normal. ![]()
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