Eh - keep in mind that most - not all - doctors and me would bang heads over what we consider as sufficient vitamin and mineral supply.
Many doctors dose these at therapeutically inefficient dosages, if they even care at all. Why do you think I have fired several of my docs and my parents docs over the last year?
If he advises you on the ground of some diet assocation or governmental boards, i would take any advice on all this food-related things with a truckload of salt, because then Big Food and Big Pharma have most likely both feet in the door. Run.