I’m not sure if a thread exists like this already but I thought it would be interesting to share links to papers or research we might find useful.
Here’s one about the gene and microbial differences in different populations of humans in different geographic regions and cultures. A lot of the differences seem to be closely correlated to diet.
Not a paper but saw this article about endosymbiosis. There’s probably a Nature article as well, gonna look for it
Might be this : Autoactive CNGC15 enhances root endosymbiosis in legume and wheat | Nature
A paper looking at how anthocyanins can reduce micro and nanoplastic reproductive toxicity. Includes an interesting chart of different anthocyanins and which types of foods they’re found in.
Thought you might like to keep this in mind when focussing on colours in your breeding projects 