USP Verified Dietary IngredientThe United States Pharmacopeia (USP) is the official authority in setting standards for all prescription and over-the-counter medicines, dietary supplements, and other healthcare products manufactured and sold in the United States. Founded in 1820, the USP is an independent not-for-profit public health organization and is committed to developing public standards to help assure good quality in medicines, healthcare delivery, dietary supplements, and related products and practices.

USP – Verified Ingredients

The USP – Verified Dietary Ingredients Program conducts testing to verify active and inactive ingredients used to manufacture dietary supplements to ensure consistent quality. These ingredients include:

  • Fine chemicals
  • Vitamins
  • Minerals
  • Amino Acids
  • Botanical Extracts
  • Non Botanicals

USP – Verified Ingredient certification means that the ingredients used are consistent in quality; they meet label claims for strength, purity, and quality; ingredients and products are prepared in accordance with accepted manufacturing processes; and the ingredients meet requirements for acceptable limits of contamination.

USP standards are enforceable by the FDA. Testing is voluntary and is available to all interested manufacturers. A USP – Verified Ingredient certification seal is displayed on all verified products and a list of all certified products is available on

Testing Process

USP – Verified Ingredient status is obtained through vigorous testing of the following:

  • Laboratory evaluation of ingredient samples for compliance with label claims and USP program requirements
  • Review of manufacturing and quality control documentation
  • Audit of manufacturers quality systems for compliance with Good Manufacturing Processes

Previously verified ingredients are often re-tested to ensure continued compliance with USP requirements.

Criteria Summary

  • Test active and inactive ingredients
  • Quality Control Documentation Review
  • Audit of manufacturing systems
  • Open to all manufacturers
  • Voluntary participation
  • Fee paid for testing

USP Contact Information

Address U.S. Pharmacopeia
12601 Twinbrook Parkway
Rockville, MD 20852-1790, USA
Telephone Number (301) 881-0666
1 (800) 227-8772
Email [email protected]