Originally Posted By: norad45
I have heard ETS'ers mention doing this on their own as well. Does it really work? What's the theory behind it?

I haven't actually tried it myself, but the idea is that iodine reacts with the Vitamin C and becomes iodide, which our taste buds don't perceive as having that iodine taste. I don't think it has any effect on that plastic taste, though, except maybe as a masking flavor.