Which of the following does not have to be listed on an ingredient label?

The correct answer is that nutritional information does not have to be listed on an ingredient label for cosmetic products. Ingredients in cosmetics are generally categorized into functions relevant to skin care, including active ingredients and various functional components like preservatives, humectants, surfactants, and color additives.

Color additives must be disclosed on ingredient labels because they can have significant implications for safety and regulation. Active ingredients are required to be listed due to their impact on the product’s effectiveness and safety. Functional components, like preservatives and humectants, also need to be specified to inform consumers about the product's formulation, especially regarding its safety and potential allergenic ingredients.

Nutritional information, on the other hand, is typically required on food products but is not relevant for cosmetics, which are applied externally and do not provide nutritional benefits in the same way that food does. Therefore, while all cosmetic products must adhere to specific labeling regulations, nutritional information is not among what is mandated for these types of goods.