Hi - I take vitamin C every day to ward off colds, and it seems to be working.
I don't vitamin C comes in acidic foods such as oranges, which can rot your teeth.
Wow, I didn't know that!  That's not good!
Give me a shot of B-12 instead any day.  The only thing vitamin c is good for is preventing scurvy.
That's interesting!  I take the Vitamin C in pill form, so I don't think I have to worry about it harming my teeth!
Most people take it to ward off the common cold.  THERE IS NO EVIDENCE VITAMIN C PREVENTS OR LESSENS THE DURATION OF THE COMMON COLD.
Really?  I know there is some controversy about it - but taking it doesn't hurt anything though.
You have an intuitive bias towards Vitamin C. I have presented you the counterfactual evidence.  In fact, Large doses may cause gastrointestinal discomfort, headache, and flushing of the skin. Will you join with me to eliminate the menace of Vitamin C?
I've never experienced any of those things - I think I'll continue to take it and will keep an eye out for anything unusual.
They even give it to pregnant women and tell them it is safe!!!  Will the madness never end?  Will you donate your reward of $1.62 to the Vitamin C elimination charity?