What Are the Effects of Caffeine on the Brain?
In answering this question, this article is referring to mainly coffee drinkers. That is how most people consume caffeine. Adenosine reception is important to sleep, especially deep sleep. There is a cycle that can exist when people drink coffee after a certain point in the day. Caffeine has a half-life of 6 hours, which means that if a person drank 200mg of caffeine, 1-2 cups of coffee, at4:00pm, then at 10:00pm, 100mg of caffeine would still be in the system blocking adenosine reception. The person may fall asleep, but would miss out on the benefits of deep sleep. That increases tiredness the following day, also increasing the desire for coffee/caffeine. When in this vicious cycle, some people experience splitting headaches, and many report extreme tiredness and depressed mood. The headaches have been found to be most likely from the dilation of blood vessels in the brain. The depressed mood is most likely just a rebound from the recent manipulation of dopamine. Every time you drink
