This case-sensitive code system http://hl7.org/fhir/entformula-additive defines the following codes:
| Code | Display | Definition |
| lipid | Lipid | Modular lipid enteral formula component |
| protein | Protein | Modular protein enteral formula component |
| carbohydrate | Carbohydrate | Modular carbohydrate enteral formula component |
| fiber | Fiber | Modular fiber enteral formula component |
| water | Water | Added water |