Which of the following refers to adding dietary or nutritional value to foods?

The correct answer is focused on the concept of enhancing the dietary or nutritional profile of foods. A nutritional supplement is specifically designed to add missing nutrients or enhance the overall nutritional value of a person's diet. These supplements can include vitamins, minerals, herbs, amino acids, and other substances that may contribute beneficially to a diet.

Nutritional supplements can take various forms such as tablets, capsules, powders, and liquids, and they are intended to fill gaps in nutrition that may not be sufficiently met through food sources alone. They play an essential role for individuals who may have dietary restrictions, specific health conditions, or increased nutrient requirements.

While the other options relate to nutrition, they do not specifically pertain to the act of adding dietary value to foods in the same way. Nutritional therapy is a broader approach focused on using food and nutrition for therapeutic purposes but does not explicitly denote supplementation. Nutritional labels serve to inform consumers about the nutrient content of food products but do not contribute to adding value themselves. Nutrient density refers to the concentration of essential nutrients per calorie in a food item, which is more about assessing the quality of foods rather than adding nutritional value directly.

Therefore, the concept of a nutritional supplement is the most fitting choice in the context of