...except Vitamin D, which doesn't really come in fruit and veg. Vitamin D deficiency can be a real problem if you're a vegetarian and/or work in an environment without much exposure to sun. I just had a physical and my D was way down.
Nice idea. In practice, if you live in a large urban area, especially in warmer climates, by the time those fruits and vegetables get to your plate, they'll have far fewer vitamins than you'd expect.
Back when I lived in Jakarta (very large urban area, very warm) I used to get mouth ulcers constantly, despite eating more than my fair share of fruits and vegetables. The solution, according to the family GP, was to supplement vitamin C. Yeah yeah, n=1 (well, n=a family of 5, but still), but it worked and seemed to lend some validity to this theory.