I'm not sure how detectable fasting during daylight hours 10% of the year would be. I'm thinking other confounding factors (like massive amount of fructose in

I'm not sure how detectable fasting during daylight hours 10% of the year would be. I'm thinking other confounding factors (like massive amount of fructose in diet driving obesity levels) in western countries would swamp that out. Not to mention the Ramadan fast is only a modest form of intermittent fasting. The caloric intake for the day is quite high, often higher than normal due to feasting, and the hours of fasting are anything from 12-18 (while eating once a day would be more like a consistent 21h of fasting year round).