Hmmmmm....I don't know much about it, so I'm only responding instinctively here, but I immediately start to wonder when you say "sugar alchohol". That's a whole different topic in and of itself! When people are calculating net carbs, there is a major debate on whether to include both fiber and sugar alchohols. There is also concern about them as AS (artifical sweetener) options (because of potential stomach discomfort). So now I'm confused about it being a more "natural" and "pure" option. <scratching head> But I digress...sorry! It's entirely up to you to have it if you want it. As far as how to calculate it, I'm thinking you should decide whether you are counting sugar alchohols as part of your carb count first. Then you'll have your answer as to whether a serving is 4g or 0g.