Figuring Out Food Labels (for Kids) - Nemours KidsHealth Other information on the label is given in percentages. Percent daily value is most useful for seeing if a food is high or low in nutrients: A food with 5% or less of a nutrient is low in that nutrient. A food with 10%-19% of a nutrient is a good source of that nutrient. A food with 20% or more of a nutrient is high in that nutrient.