IANA nutritionist or expert at all in this area so take this with a grain of salt, but my understanding from looking into it is that the sugar alcohol doesn't break down in digestion and isn't absorbed, that's why the "carbs" from sugar alcohol "don't count."
I would recommend taking it easy on the sugar alcohols even though they "don't count" because they can cause significant gas ;-)
Indeed. My dog loves the dissolve-on-your-tongue melatonin, but it is super deadly to her because of the Xylitol. I keep it on a high shelf now and am very careful to pick up any pieces that might get dropped. She made it through, but that was a terrifying few days D-:
I also hate the games they play with labeling such as "no sugar added." Bought a cherry pie from a local market labeled "no sugar added" thinking it was going to be extra tart only to take it home and taste sugar. Reading the label it listed sugar alcohol which I learned can cause gas and bloating in some people, which I soon found out. Once slice had me doubled over with gas pains a whole night and shit my brains out the next day. I got my money back for that piece of garbage pie. I want to punch whoever thought no sugar added means fuck all...
Sugar alcohols seem simple enough to me. The properties vary but they generally have fewer calories per gram and a low glycemic index, and some of them are much sweeter per calorie.