 GDAs are guidelines for healthy adults and children about the approximate amount of calories, fat, saturated fat, total sugars, and sodium/salt.The GDA labels have the percentage of daily value per serving and the absolute amount per serving of these categories.The front-of-packages (FOP) GDAs must at least have calories listed, but the back-of-package (BOP) GDAs must list, at a minimum, these five key nutrients