From my experiences w/the bars, I've noticed that even if I eat just one, my *ahem* bootie trumpet tunes up.

I also get it from certain LC candies. Basically, I think that it's just a reaction to the consumption of sugar alcohols. IMHO, you may want to experiment w/how many bars and/or how often you eat them to see if they affect you differently.

Good luck!
Nikki