Nutritional estimates are based on the USDA National Nutrition Database, and calculated by matching terms and weights to this database. The accuracy of these calculations cannot be guaranteed because of the wide range of ways people can write ingredeints, so there can be cases where items are missed, weights not calculated correctly or nutritional values matched to the wrong things.
We will continue to work on the accuracy of these estimates, but they are not intended for medical nutrition purposes. If you are following a strict diet for medical or dietary reasons, it is important that you consult your physician or registered dietitian before planning your meals based on recipes estimates on Say Mmm.