To get more vitmin C - eat fruits and vegetables.  That's allowed isn't
it?  It's something that can be eaten while wandering around naked with
nothing but a sharp stick.   But, if you're eating nothing but meat and
fat, perhaps supplements should be taken.
        As for losing 10 lb in one week or month - I think that varies alot
from person to person - their metabolism, their beginning weight.

Clint