Nutrient density is usually measured per 100 kilocalories because it describes the nutrient content relative to energy.

• A. It is assessed relative to energy content and typically expressed per 100 kilocalories.
• B. It is measured per gram of food.
• C. It is measured per day intake.
• D. It is measured by total calories only.

Answer: (A)

Nutrient density compares how much of a nutrient a food provides relative to the energy it supplies. Measuring it per a set amount of energy, typically per 100 kilocalories, standardizes foods so you can fairly compare how nutrient-rich they are regardless of portion size. This approach highlights foods that deliver more vitamins, minerals, and other beneficial nutrients for the calories they contain, helping guide choices toward nutrient-dense options. Measuring per gram would mix nutrient content with moisture and serving size, per day would reflect total intake rather than density, and using total calories alone ignores the actual nutrient amounts present.