I would guess that most human health issues that are universal across the species have been discovered at this point. Vitamin C and Iodine deficiencies cause se

I would guess that most human health issues that are universal across the species have been discovered at this point. Vitamin C and Iodine deficiencies cause serious problems for all humans. Large studies that see some small effect are likely to be variance where a few people are have large positive effects and others not or even negative. That is your individual genetics and other factors are going to determine if some advice is useful for you. Listening to your parents and grandparents is probably more useful than reading almost all modern health studies.