> For the complete documentation index, see [llms.txt](https://docs.snomed.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.snomed.org/education/snomed-ct-education-editorial-guide/readme/authoring/domain-specific-modeling/observable-entity/observable-entity-modeling/nutritional-intake-observable-entities.md).

# Nutritional intake observable entities

<mark style="color:$danger;">**This Editorial Guide is used for Education Purposes Only. It is used in the Authoring Courses and Certifications. It is based on the January 2026 Editorial Guide.**</mark>

Naming conventions for estimated and measured intake or nutrient administration, in aggregate or as a portion of intake via a specified route (ie, oral, gastroenteral \[enteral nutrition], parenteral nutrition, and via intravenous fluids), is as follows:

FSN: \[technique] quantity of intake of \[substance] via \[route] in \[timeframe] (observable entity)

SYN: \[technique] quantity of intake of \[substance] via \[route] in \[timeframe]

See the specific template: [A nutritional intake (observable entity) - v1.0](https://conf.spaces.snomed.org/wiki/spaces/SCTEMPLATES/pages/133996328/A+nutritional+intake+observable+entity+-+v1.0).

* For example,
  * 789106008 | Estimated quantity of intake of phosphorous in 24 hours (observable entity)|
    * FSN: Estimated quantity of intake of phosphorous in 24 hours (observable entity)
      * PT: Estimated quantity of intake of phosphorous in 24 hours

<figure><img src="/files/QixiZIMJKxJkhBWL2Nnm" alt=""><figcaption><p>Figure 1. Stated view of 789106008 |Estimated quantity of intake of phosphorous in 24 hours (observable entity)|</p></figcaption></figure>

{% hint style="warning" %}
**Dietary**

"Dietary" is considered ambiguous and should not be included in SNOMED CT. Existing content that includes "dietary" will be considered for inactivation.
{% endhint %}

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