What do we call food items offered in self-service settings like salad bars or buffets?

Food items offered in self-service settings, such as salad bars or buffets, are categorized as self-service items. This classification is relevant because it reflects the unique aspect of how customers interact with the food. In these settings, patrons have the freedom to select and serve themselves from a variety of options, allowing for customization based on personal preferences and dietary needs. This self-service model enhances the dining experience by providing a diverse array of foods and enabling customers to control portion sizes.

The other options are more specific and do not accurately describe the context in which food items in self-service areas are presented. For instance, nutrient-content items refer specifically to foods that carry claims about their nutritional benefits, while standard menu items typically refer to pre-defined selections offered at a restaurant, often requiring staff assistance. Vending machine items are those that are dispensed from a vending machine, which is a distinct service model altogether. Thus, the term self-service item is the most appropriate for describing the food offerings in self-service environments.