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I suspect that “if” will be more difficult than just measuring the vitamin and mineral content of random samples of the produce directly, but even if it isn’t, taste would rapidly be another flawed proxy: https://en.m.wikipedia.org/wiki/Goodhart%27s_law

(I’d argue that taste is already an example of Goodhart’s law, and that this is why fast food is popular despite being objectively bad).

That is interesting and relevant for me. A quick search only gave this, mainly about antioxidants. Do you know of more good literature?

https://www.nationalgeographic.com/culture/article/organic-f...

What about a handheld scanner using smell to distinguish good from bad. As long as food isn't bred to smell certain ways that can't be distinguished from good, it should work fine.

Saline-injected tomatoes... Coming soon!

Or tomatoes with a healthy corn syrup glaze.

It's a bit old and maybe they've learned more, but don't inject them with saline, just irrigate them with 10% sea water.

https://www.livescience.com/7194-healthier-tomatoes-grown-se...