Most diet tracking nutrition research is not that good, consisting of surveys that ask you what you've eaten for the past year, from memory and then doing corre

Most diet tracking nutrition research is not that good, consisting of surveys that ask you what you've eaten for the past year, from memory and then doing correlations. Most people don't remember what they've eaten last week. I think to do something really accurate nutrition wise would cost way too much money and take too long, so it mostly doesn't get done well. So unless you do something specific with faith practice communities that are good about their strict diets and fasting, like Buddhist monks, there probably isn't much good research data for that in the first place. And then that has issues with controlling for other things, like meditating a lot, etc.