No clue. Here's what happened to me.

I'm a 6'5" 300 lbs male. I was taking upwards of 7g a day of vitamin c. Past that, I would get heavy flatulence, explosive diarrhea, and general gastronomic distress. I felt no change on my inside for doing excessive C, nor did I have any size effects other than the ones I noted for going past that.

One case, when I got sick, I was taking C. I wanted the illness to quit quickly, because I didn't want to be sick. So I took 8g C, 2 tablets of echinacea, and a NSAID. What happens was worse than any cold ever thought about being.

I killed off all my flora and fauna in my intestines. With this brought massive burning diarrhea (from the unneutralized stomach acid). I had this situation for 5 days straight. I was on the toilet at least 20x a day, day and night. Finally, day 6 had the formation of stool, which I cheered at. Day 7 and I was somewhat back to normal.

According to the NHS (http://www.nhs.uk/Conditions/vitamins-minerals/Pages/Vitamin...), 1000mg is the typical cut-off for where vitamin C becomes toxic (which is dramatically higher than the 40mg a day most people actually need).

Probably not, but there's not much point in doing so, as you'll pee it all out anyway.