 Moreover, not all categories are equal.While a GDA for calorific intake might represent a broad target in so far as people need to take in a minimum of calories to survive, the GDA for saturated fat is not a target, as ingesting no saturated fats at all would not be harmful to health, so long as there were fats of a non-saturated variety in the diet.GDAs are now in widespread use across the food industry and appear both on the front and back of food packaging.