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# bloodType

A characteristic type identifier for the user’s blood type.

```
static let bloodType: HKCharacteristicTypeIdentifier
```

## Discussion

This type uses values from the [`HKBloodType`](/documentation/HealthKit/HKBloodType) enum.

## See Also

[`HKCharacteristicType`](/documentation/HealthKit/HKCharacteristicType)

A type that represents data that doesn’t typically change over time.

[`HKCharacteristicTypeIdentifier`](/documentation/HealthKit/HKCharacteristicTypeIdentifier)

The identifiers that create characteristic type objects.

[`HKBloodType`](/documentation/HealthKit/HKBloodType)

Constants indicating the user’s blood type.

[`HKBloodTypeObject`](/documentation/HealthKit/HKBloodTypeObject)

This class acts as a wrapper for the [`HKBloodType`](/documentation/HealthKit/HKBloodType) enumeration.


---

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