---
title: dietaryNiacin
framework: healthkit
role: symbol
role_heading: Type Property
path: healthkit/hkquantitytypeidentifier/dietaryniacin
---

# dietaryNiacin

A quantity sample type that measures the amount of niacin (vitamin B3) consumed.

## Declaration

```swift
static let dietaryNiacin: HKQuantityTypeIdentifier
```

## Discussion

Discussion These samples use mass units (described in HKUnit) and measure cumulative values (described in HKQuantityAggregationStyle).

## See Also

### Related Documentation

- [HKQuantityTypeIdentifier](healthkit/hkquantitytypeidentifier.md)
- [HKQuantitySample](healthkit/hkquantitysample.md)
- [HKQuantity](healthkit/hkquantity.md)

### Vitamins

- [dietaryVitaminA](healthkit/hkquantitytypeidentifier/dietaryvitamina.md)
- [dietaryThiamin](healthkit/hkquantitytypeidentifier/dietarythiamin.md)
- [dietaryRiboflavin](healthkit/hkquantitytypeidentifier/dietaryriboflavin.md)
- [dietaryPantothenicAcid](healthkit/hkquantitytypeidentifier/dietarypantothenicacid.md)
- [dietaryVitaminB6](healthkit/hkquantitytypeidentifier/dietaryvitaminb6.md)
- [dietaryBiotin](healthkit/hkquantitytypeidentifier/dietarybiotin.md)
- [dietaryVitaminB12](healthkit/hkquantitytypeidentifier/dietaryvitaminb12.md)
- [dietaryVitaminC](healthkit/hkquantitytypeidentifier/dietaryvitaminc.md)
- [dietaryVitaminD](healthkit/hkquantitytypeidentifier/dietaryvitamind.md)
- [dietaryVitaminE](healthkit/hkquantitytypeidentifier/dietaryvitamine.md)
- [dietaryVitaminK](healthkit/hkquantitytypeidentifier/dietaryvitamink.md)
- [dietaryFolate](healthkit/hkquantitytypeidentifier/dietaryfolate.md)