UNII Overview

For more information about UNII, please see the following section of the FDA Standards Advisory Board website: FDA Global Substance Registration System.

Key Facts

  • Source of the data:
    Unique Ingredient Identifiers
  • Changes to the source data:
    openFDA may change some field names and converts the data into JSON, which is a widely used machine readable format.
  • Time period covered in this API:
    2006 to null
  • Frequency of API updates:
    Daily