I've learned a lot about vitamin C in my chemistry class. It's absolutely fascinating. It used to prevent pirates from getting scurvy, by eating lemons.
Ohh yeah, I love citrus too so I'm a fan.
Many people take very large doses of vitamin C to prevent things like a cold but the  United States Institute of Medicine recommends against it.
Oh like those powder supplements?
Yeah, just like those High C supplement powders. The daily recommended amount is about 90 mg/day but some of those supplements are closer to 2000mg/day.