But when it comes to how coffee impacts one person’s sleep versus another’s IRL, it can be a totally different story. So that’s the basic science on how caffeine can harm our sleep. (There is also strong evidence that the more caffeine you drink and the later in the day you drink it, the more likely you are to get a bad night’s sleep, which makes perfect sense considering how half-life elimination works.) Why caffeine affects everyone differently Sampat says, reducing the time spent in slow-wave sleep ,the deepest stage of sleep. Caffeine may also interfere with the way you progress through the various stages of sleep, Dr. This makes your sleep less efficient and can make you feel less refreshed in the morning. “Caffeine can increase your arousal frequency-how many times your brain wakes up each night, though you may not remember,” Dr. But caffeine can also reduce your total sleep time by interrupting your sleep throughout the night. Is coffee bad for you? Caffeine’s primary effect is that it makes it harder to fall asleep initially (also called prolonged sleep latency), Dr. And caffeine is essentially an adenosine antagonist, binding to molecules of adenosine and lessening its sleep-inducing effects, Dr. The longer you’re awake, the more adenosine you have in your system,” Dr. “Adenosine is like a sleep-inducing molecule that your brain makes while you’re awake. Caffeine acts on a chemical in your brain called adenosine, neurologist and sleep medicine specialist Ajay Sampat, M.D., assistant clinical professor at UC Davis Health, tells SELF. Coffee contains the central nervous system stimulant known as caffeine. Let’s briefly refresh ourselves on how coffee provides its signature buzz in the first place. Here’s what to know about how late you can drink coffee without sacrificing sleep. It’s a real tradeoff, and it’s hard to know if it’s one worth making. Should you ride out the exhaustion (and possibly face plant at your desk)? Or should you perk yourself up with a cup of coffee-and potentially put the good night’s sleep ahead of you in peril? Now I mostly drink decaf coffee so I don't have to worry about it - and whether it'll affect my sleep.It’s 4 o’clock, you can barely keep your eyes open, and you’ve got a tough decision to make. That blew my mind, and made me reconsider when and how much I drink coffee. and that's assuming you haven't piled another cup of normal-strength coffee on top (I rarely took breaks when I drank full-strength coffee, so it would just continue to pile up). > That means that, for a 9am cup of coffee, the caffeine is still in your system until around 3-5pm the following day.
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