I take a vitamin C supplement of 1000 milligrams as an antioxidant. What are the effects related to excess?

I am taking a supplement of 1 gram of vitamin C as an antioxidant. What are the collateral effects related to the excess of Vitamin C?

First of all, it turns your urine yellow. It makes your urine more acid, which decreases urinary pH and the possibility of urinary tract infections.

Beyond that 1 gram (1000 milligrams) of Vitamin C per day is excessive as an antioxidant; 500 milligrams would be sufficient, according to the latest research on cancer and antioxidants.