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The so-called stress hormone—which, among other things, helps regulate energy and makes you feel alert—fluctuates throughout the day, but is generally high in the morning and low in the evening.
“However, drinking coffee too late in the day—or consuming too much caffeine throughout the day—can interfere with your sleep by delaying sleep onset or reducing overall sleep quality ...
"If you sense that you may be a slow metabolizer of caffeine, it is best to limit caffeine to a maximum of 200 milligrams per day and stop all caffeine intake at least eight hours before bedtime ...
[2] Caffeine reduces slow-wave sleep in the early part of the sleep cycle and can reduce rapid eye movement sleep later in the cycle. Caffeine increases episodes of wakefulness, and high doses in the late evening can increase sleep onset latency. In elderly people, there is an association between use of medication containing caffeine and ...
The study found any caffeine intake in general reduced risks of CM, although did not find strong evidence that tea reduced the risk of stroke and Type 2 Diabetes. By contrast, a 2011 review had found that drinking one to three cups of coffee per day may pose a slightly increased risk of developing hypertension. [22]
A power nap or cat nap is a short sleep that terminates before deep sleep (slow-wave sleep; SWS). A power nap is intended to quickly revitalize the sleeper. A power nap combined with consuming caffeine is called a stimulant nap, coffee nap, caffeine nap, or nappuccino. [1]
"A typical dose of caffeine (100 mg) can be consumed up to 4 hours prior to bedtime without significant effect on subsequent sleep. To mitigate caffeine-induced sleep disruptions, it is ...
Caffeine dependence can cause a host of physiological effects if caffeine consumption is not maintained. Commonly known caffeine withdrawal symptoms include headaches, fatigue, loss of focus, lack of motivation, mood swings, nausea, insomnia, dizziness, cardiac issues, hypertension, anxiety, and backache and joint pain; these can range in severity from mild to severe. [18]