Technically they are vegetable, not a carb, even though they're in noodle form. There's another form, konnyaku, that's made out of the same stuff, but it's in a block form. Even though it has carbohydrate counts of 40 (or anything actually), there are many veggies that have high carb counts. The House brand is actually made out of Yam, which is a carb, so be careful which brand you're buying if you're looking to stay away from starches. Konnyaku/Shirataki have virtually no nutritional value (it's mostly water), so don't eat too much of it.