This website http://www.theminimalists.com/diet/ claims that "...because of diet and exercise, I need less sleep than I used to. Most mornings I wake around 3:30 a.m., after five or six hours of sleep". According to https://sleepfoundation.org/press-release/national-sleep-foundation-recommends-new-sleep-times (admittedly, a more reputable source on matters of health) they recommend that "Adults (26-64)" sleep "7-9 hours" per night. I understand that this applies to the average adult, so it seems that the first source could be true. So this made me wonder, what effect (if any) does diet have on someone's sleep?
Thanks in advance.