Consumer Health

"USP provides documentary standards and reference materials for determining product and ingredient identity, strength, quality, and purity. These standards help limit the introduction of potential adulterants and contaminants, and serve as a widely acknowledged quality benchmark in the buying and selling of dietary supplement products and their ingredients in the global marketplace. In addition to its standards, USP offers third-party, independent verification services for dietary supplement finished products and dietary ingredients."

"Natural Products Association, a nonprofit, represents over 1,900 members accounting for more than 10,000 retail, manufacturing, wholesale, and distribution locations of natural products, including foods, dietary supplements, and health/beauty aids."
Bills itself as "The first and only natural certification in the U.S., more than 1,100 products and ingredients have been certified under the NPA Natural Seal."