https://build.fhir.org/nutritionintake-definitions.html#NutritionIntake.consumedItem requires the presence of A consumed item which in turn requires the presence of a specific code and additionally a reference to a nutrition product or an additional code for that product. These requirements are too stringent.

Consider the use case where the one simply wants to log the total macronutrients consumed in a meal. In this case the consumed item array is empty and that should be fine.

Consider also the use cases where a product has not been categorized by type, or where only a type is known and no detailed product information is provided. All of these should be expressable.