> Nutrition is confusing because we’re not used to looking at lots of tiny effects adding up to something large.

This. I think is always more complicated than we think.

And one thing that many times is left out of the discussion is that some foods may have different effects on one individual than others. I was once looking for videos that talk about this and after watching too many, the only one found was :

“What is the best diet for humans? | Eran Segal | TEDxRuppin” https://www.youtube.com/watch?v=0z03xkwFbw4

When explaining their studies, at one point he said “It was not just about the food, it was also about the person eating it”