You can add nutrition data to Google Fit by [creating a data source](https://developers.google.com/fit/scenarios/add-nutrition-data#creating_a_data_source) and using
the [`com.google.nutrition`](https://developers.google.com/android/reference/com/google/android/gms/fitness/data/DataType#TYPE_NUTRITION) data type. Each data point represents the value
of all nutrients consumed in a meal or snack. This example shows you how to add
nutrition data for someone who's eaten a banana.

## Creating a data source

### Android

Use `DataSource.Builder` to create a new data source. For example, `nutritionSource`.

    val nutritionSource = DataSource.Builder()
        .setDataType(DataType.TYPE_NUTRITION)
        // ...
        .build()

### REST

Call the REST API to create a new data source. For example, `NutritionSource`.

**HTTP method**

    POST

**Request URL**

    https://www.googleapis.com/fitness/v1/users/me/dataSources

**Request body**

    {
      "dataStreamName": "NutritionSource",
      "type": "raw",
      "application": {
        "detailsUrl": "http://example.com",
        "name": "My Example App",
        "version": "1"
      },
      "dataType": {
        "name": "com.google.nutrition",
       }
    }

**Response**

If your data source was created successfully, you'll get a [`200 OK`](https://httpstatuses.com/200) HTTP
response status code. The response body contains a JSON representation of
the data source, including a `datasource.dataStreamId` property. Use this ID
as the `dataSourceId` to add data.

**CURL command**

```
$ curl --header "Authorization: Bearer ya29.yourtokenvalue --request POST \
--header "Content-Type: application/json;encoding=utf-8" --data @nutrition-ds.json \
https://www.googleapis.com/fitness/v1/users/me/dataSources
```

## Adding nutrition data

### Android

This example shows you how to create a new data point, and add nutrition
data for a banana, using the `nutritionSource` data source.

    val nutrients = mapOf(
        Field.NUTRIENT_TOTAL_FAT to 0.4f,
        Field.NUTRIENT_SODIUM to 1f,
        Field.NUTRIENT_SATURATED_FAT to 0.1f,
        Field.NUTRIENT_PROTEIN to 1.3f,
        Field.NUTRIENT_TOTAL_CARBS to 27.0f,
        Field.NUTRIENT_CHOLESTEROL to 0.0f,
        Field.NUTRIENT_CALORIES to 105.0f,
        Field.NUTRIENT_SUGAR to 14.0f,
        Field.NUTRIENT_DIETARY_FIBER to 3.1f,
        Field.NUTRIENT_POTASSIUM to 422f
    )
    val banana = DataPoint.builder(nutritionSource)
        .setTimestamp(timestamp, TimeUnit.MILLISECONDS)
        .setField(Field.FIELD_FOOD_ITEM, "banana")
        .setField(Field.FIELD_MEAL_TYPE, Field.MEAL_TYPE_SNACK)
        .setField(Field.FIELD_NUTRIENTS, nutrients)
        .build()

### REST

This example shows you how to add a set of nutrition data using the
`NutritionSource` data source. The values for the nutrition data type are
nutrients (a map), meal type (4 = 'snack'), and the actual food item
(a string).

**HTTP method**

    PATCH

**Request URL**

<br />

```html
  https://www.googleapis.com/fitness/v1/users/me/dataSources/datasource.dataStreamId/datasets/1574159699023000000-1574159699023999000
 
```

<br />

**Request body**

<br />

```restructuredtext
    {
      "minStartTimeNs": 1574159699023000000,
      "maxEndTimeNs": 1574159699023999000,
      "dataSourceId": "datasource.dataStreamId",
      "point": [
        {
          "startTimeNanos": 1574159699023000000,
          "endTimeNanos": 1574159699023999000,
          "dataTypeName": "com.google.nutrition",
          "value": [
            {
              "mapVal": [
              {
                "key": "fat.total",
                "value": {
                  "fpVal": 0.4
                }
              },
              {
                "key": "sodium",
                "value": {
                  "fpVal": 1.0
                }
              },
              {
                "key": "fat.saturated",
                "value": {
                  "fpVal": 0.1
                }
              },
              {
                "key": "protein",
                "value": {
                  "fpVal": 1.3
                }
              },
              {
                "key": "carbs.total",
                "value": {
                  "fpVal": 27.0
                }
              },
              {
                "key": "cholesterol",
                "value": {
                  "fpVal": 0.0
                }
              },
              {
                "key": "calories",
                "value": {
                  "fpVal": 105.0
                }
              },
              {
                "key": "sugar",
                "value": {
                  "fpVal": 14.0
                }
              },
              {
                "key": "dietary_fiber",
                "value": {
                  "fpVal": 3.1
                }
              },
              {
                "key": "potassium",
                "value": {
                  "fpVal": 422.0
                }
              }
             ]
            },
            {
              "intVal": 4
            },
            {
              "strVal": "banana"
            }
          ]
        }
      ]
    }
```

<br />

**Response**

If your data point was created successfully, you'll get a [`200 OK`](https://httpstatuses.com/200) HTTP
response status code. The response body contains a JSON representation of
the data set.

**CURL command**

```
$ curl --header "Authorization: Bearer ya29.yourtokenvalue --request PATCH \
--header "Content-Type: application/json;encoding=utf-8" --data @nutrition-data.json \
https://www.googleapis.com/fitness/v1/users/me/dataSources/datasource.dataStreamId/datasets/1574159699023000000-1574159699023999000
```

> [!NOTE]
> **Note:** Use `--request PATCH` (not `--request POST`) in your CURL command when adding data.