Daily value is the American labelling reference that tells shoppers how much of a nutrient one serving of a food provides relative to a full day’s needs. Set by the US Food and Drug Administration, the figures appear on the Nutrition Facts panel as “% Daily Value,” calculated for a 2,000-calorie daily diet — 5% or less counts as low, 20% or more as high. The values cover macronutrients, fibre, vitamins, and minerals, and they let consumers compare products at a glance without doing the arithmetic themselves. Manufacturers use them to support claims: “good source” and “excellent source” have legal definitions tied to daily-value percentages. It is the US counterpart of recommended daily intake systems used elsewhere — a single, standardised yardstick that turns the back of the pack into a practical guide for building a day’s diet.