The nutritional analysis of recipes and menus in Shop'NCook is based mainly on the data from USDA database. You can also manually input your own data.
To view the original data, display the Nutrition tab of the recipe and click on the magnifying glass next to the ingredients. It will display the nutritional information window with the details of the nutritional analysis and the description of the corresponding ingredient.
You can modify the nutritional analysis by clicking on the Edit button of the nutritional information window. Input then new nutritional values manually or import a different data from the USDA database by clicking the Import button.