Final answer:
The Recommended Dietary Allowance (RDA) is the average daily amount of a nutrient considered adequate to meet the known nutrient needs of practically all healthy people. The percentage of the adult recommended daily value (% DV) helps gauge nutrient intake, and nutrient density measures the nutrient content relative to the calorie content of a food.
Step-by-step explanation:
The value you're referring to is the Recommended Dietary Allowance (RDA). The RDA is the average daily amount of a nutrient considered adequate to meet the known nutrient needs of practically all healthy people and serves as a goal for dietary intake by individuals. It takes into account the different nutrient needs at various stages of life and can vary based on gender, age, and other factors such as health status and activity level. The % DV, or percentage of the adult recommended daily value, is a guide that can help individuals understand how much of each nutrient they should consume in relation to a standard 2,000 calorie diet.
Foods that provide high percentages of DVs, typically 20% or more, are considered high in a nutrient, while those with 5% or less are considered low. Nutrient needs are not just focused on vitamins and minerals but also macronutrients such as proteins and carbohydrates which provide the energy necessary for maintaining a healthy, active lifestyle. The concept of nutrient density is also important, which refers to the amount of a nutrient provided by a food relative to the number of calories it contains.