Vitamin C and disease prevention

From this
Classic Cecil

Ok, I take a 500mg tablet of C every day basically with the mindset that hey, it can’t hurt.
One thing I had heard in a high school science class that since Vitamin C is water soluble, it’s really hard to overdose on it. The only negative side effect I’m aware of his a little case of the hershey squirts.
What other cons are there to taking too much?

Very expensive pee.

Um that should be “poo.”