When I look at this image [0] it seems to me that muslim countries (which tend to fast once a year, I guess?) and poor countries have fewer cases of cancer.
But at least with the poor countries I'm not sure if it's because people die of other reasons before they even could get cancer.
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).
thanks, did not see that on mobile. so now we can just skip right on over to how people in those African regions die before they even reach more probable cancer age, it absolutely is more so because of them dying, as you initially pondered. Life expectancy is an average, and that average is less than 60 years old in large regions.
But at least with the poor countries I'm not sure if it's because people die of other reasons before they even could get cancer.
[0] https://qph.fs.quoracdn.net/main-qimg-a0728f7c2418f32922558b...