This was claimed by Shawn Stevenson (author of Sleep Smarter) on the Tom Bilyeu show. Whether the claim is true or not, the science and your own sleep-deprived self will tell you that sleep is vital for great health. So I'm curious, where are the discussions on sleep in this forum? Assuming we used a measure for optimal health where we measure 'If I were to deprive you of X for 24 hours and your objective was to stay alive, which item in descending order of importance would you want to retain?' Correct me if I'm wrong but the the order would look something like this: 1. Air Die in minutes without it. 2. Water Die in days without it. 3. Sleep No evidence that you can die from lack of sleep but longest time is ~11 days someone has gone without it, and at that point you're extremely dysfunctional. 4. Food Die in months without it (give or take, depends on many factors like individual biology, amount of body fat etc...) 5. Exercise Not sure you can die from lack of it anytime soon but many years down the track you're probably going to live a shorter and lower quality life without it. Again the assumption here is that what your body demands for survival is what equates to optimal health. Do you think this is a reasonable assumption to make? And if so, why should we focus on food and exercise before healthy sleeping habits?