Actually, the FDA RDA for Vitamin C provides enough of this (non-fat-soluble, and therefore very poorly stored in the body) vitamin that your reserve, at equilibrium, will get you through thirty days of complete deprivation with no symptoms. Which is nice, but means that if your intake is below the RDA but decently reliable you will still be fine. I'd be surprised if my intake were above 30% RDA on average, but I have never had symptoms of scurvy.

I second the "individual response" paragraph. A lot of people say they feel hungry and unsatisfied after a full meal of mostly starch. I feel great after eating starch but feel hungry and unsatisfied after a full meal of mostly meat.