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I'm not sure if we know enough about diet and sleep to assert this with confidence.

• kharak 7y ago
  I believe we do. For example, the book "Why we sleep" goes into the health and performance costs of not enough sleep. And even one hour of lost sleep is already significant.
  • balfirevic 7y ago
    That book is perhaps not the best example: https://guzey.com/books/why-we-sleep/ https://guzey.com/books/why-we-sleep/
  • copperx 7y ago
    Even if the author's arguments are true, the book doesn't even try to explain the effects of oversleeping. We know it's associated with higher mortality risk, just like insufficient sleep. But the author conveniently ignores this fact and advises everybody to sleep for at least 8 hours.
• GuB-42 7y ago
  We don't really know about the fine details of diet, such as the importance of meat, the kinds of sugars and fats that are good for you, etc... However, the are some obvious things we know for sure. Eat too little and you starve, eat too much and you become obese, don't get vitamin C and you get scurvy, etc... Same thing about sleep. No sleep = you die. Starting from there, it is obvious that extreme sleep deprivation is bad for you. It is the details that are less certain.