Visit http://www.usp.org to learn more. What is a pharmacopeia? Since 1820, the United States Pharmacopeia has been the authoritative organization working to ensure the consistency and quality of medicines and vitamins. USP reference standards are recognized by the FDA as the standard for testing vitamins and medicines against, ensuring quality products that contribute to public health and wellness.
To help manufacturers, suppliers, and regulators safeguard the dietary supplement supply, USP provides documentary standards and reference materials for determining product and ingredient identity, strength, quality, and purity.