What affects does too much vitamin C have?

around 200% daily recommended...

you pee it out- the body just won't absorb what it doesn't need

RDA for females is around 75mg.  150mg won't hurt you.   (whoops - you're a guy     90mg for men.)

See Merck for more info.

the only thing that will happen is that you can get stomach cramps. but yah, unless your realllly overdoing it, you just pee it out

I take roughly 7,000 to 10,000 mg of vitamin C daily. The only things that might happen are tummy cramps or loose stools... otherwise, nothing. It is a water-soluble vitamin which means you pee it out. 

Ditto to other posters. Too much C can give you the runs, but only at like 15x or more of the daily reccommended intake, or something crazy like that. I take a C supplement that gives me 833% DV and have no digestion issues.

Too much Vitamin C might also cause nausea.