Dosage and Thyming Make the Poison

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Cafine is a stimulant, and it's in a class of drugs that we call the psychoactive stimulants. It can harm your sleep in at least three ways. Even just one to two cups of coffee in the early or late evening can decrease the amount of your deep sleep anywhere between 20 to forty %. Once you get past about three or four cups of coffee a day, then the health benefits start to go in the opposite direction - not only in terms of health but also in terms of sleep too.

Renowned sleep scientist Matthew Walker discusses everything you need to know about what a better night’s sleep can do for your life, and how to prioritize and perfect the way you sleep. Walker breaks down how to identify when you need more sleep, how to deal with insomnia, the best devices to track your sleep, and some unconventional sleep hygiene tips, including why it’s never a good idea to count sheep. Walker is a Professor of Neuroscience and Psychology at the University of California-Berkeley, and is also the founder and director of the Center for Human Sleep Science. He has published over 100 scientific research studies on the impact of sleep on human brain function, and he is the author of the 2017 book, Why We Sleep: Unlocking the Power of Sleep and Dreams. --

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