False advertising.
Per two-ounce serving, De Cecco 100% semolina spaghetti has 39 grams net carbs.
Dreamfields cuts that by 8% to 36 grams by substituting inulin, wheat gluten, xanthan gum, and pectin for some of the semolina. A serving with five grams of net carbs would be about a quarter of an ounce.