Final answer:
The Nutritional Facts Panel provides essential information for comparing nutritional contents of packaged foods, helping consumers make healthier choices by showing nutrient content and % Daily Value.
Step-by-step explanation:
The standard most useful for comparing the nutritional contents of packaged foods to make more healthful choices is the Nutritional Facts Panel.
This label provides information on nutrient content, such as the amount of fiber, protein, sodium, and sugar a food contains, as well as its proportional % Daily Value (%DV) based on a 2,000-calorie diet.
Moreover, the list of ingredients provided in descending order can further guide in choosing healthier options, encouraging the selection of whole grains and the avoidance of processed ingredients.