Exactly, we're constantly changing, and the food must adapt to it

I'm thinking mostly of vitamins and minerals. I've never thought about it in terms of which ones are more important, so I'm struggling to come up with a sensible answer, but I think it may depend on the individual, and what state they're in.

PS: I recently watched this video https://youtu.be/VaL8EXQE8Uc where the author, an MD, was talking about the importance of salt, which I found a novel and interesting take.