ISO/TR 23304:2021

This document provides guidelines on:
- how to express vitamin quantity,
- the expression of different molecular forms in appropriate units,
- and in some cases, vitamin activity, according to vitamers present or used in food products, in addition to the quantitative content determination obtained from ISO and CEN analytical standards.
It provides information to be used as a basis for discussion between stakeholders and food control laboratories. It is not intended to be prescriptive or exhaustive.