I would think its the sugar alcohols they use in so called 'surgar free' items- they use to only be used in diabetic food items so it wasn't something you would run into very often, but with the low carb craze, they're being used in a lot more foods and they don't seem to carry the warning that they do on diabetic foods about GI upset.
I ran into a problem with some low carb bars I bought recently- they were on clearance at WalMart so I decided to give them a try since they were carmel pecan & didn't have any corn syrup in them...its hard to find much in the way of carmel type stuff without corn syrup so I was excited
. I was fine when I ate one the night I got them, but they tasted too good & I ended up eating one for breakfast the next day...and another one for lunch
. In my defense, I'm still weaning off tube feeding formula so its not unusual for me to use meal replacement bars. I was part way through the lunch one when it really hit my system...probably delayed reaction since my GI problem slows down how quickly food leaves my stomach...of course the GI problem also means I've had chronic nausea 24/7 for 4 years so even if the bars made me nauseaous, I wouldn't have noticed. I spent the rest of the day really close to the bathroom & contemplating how they should use these bars in place of the icky stuff you have to drink for colonoscopies
Irronically, the sugar alcohols might actually be beneficial for my GI problem...and a lot cheaper then the med I have to get from Canada that is suppose to help my stomach work more normally
I hope you are feeling better now- but just in case, here's a hug
If you do find out what sweeteners they did use could you post it. I need to find out all the different names they go by...if I come up with a good list from somewhere, I'll be sure to share it.