According to the American Dietetic Association:
For persons aged 19 or older, the recommended daily allowance for vitamin C is 90 milligrams per day for men and 75 per day for women.
For pregnant women the RDA is 85 milligrams and rises to 120 milligrams per day during lactation.
The fact is: vitamin C is a water soluble vitamin, thus any amount above what the body needs is simply excreted.
It does not take much to consume the amount that we need, for example just one cup of orange juice provides 83.1 mg of vitamin C.