Perhaps slightly tangential - I listened to a set of lectures on genetics[0], one of the biggest takeaways for me was that although it's apparent diet is one of the largest[1] (I forget if it is the largest) factors in cancer rates, we aren't sure which foods in particular cause dramatic increases or decreases in cancer probability

[0] - https://www.thegreatcourses.com/courses/understanding-geneti... [1] - we believe it is a large factor due to the fact migrants adopt the same cancer rate when they join the native population