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.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6612215/
Its pretty well know mtor/igf-1 stimulates growth. All growth. This is great for youth. Not so much for aging.
"Studies on autophagy-deficient mouse models indicate that the basal levels of autophagy can suppress tumor formation at the initiation of tumor development." - https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC6274804/