Er... Second ingredient is maltodextrin?
Well, it's not sucrose, so there's no sugar!
2g of carbs per how much product?
As for erythritol... http://en.wikipedia.org/wiki/Erythritol
As for tagatose...
So, it's a product with two low calorie sweetners and maltodextrin.
I really like this wikipedia thing, have to use it more often.