Douglas Laboratories, Pittsburgh, PA, has earned NSF GMP registration for its vitamin and nutritional supplement production facilities. NSF conducted an independent audit of Douglas Laboratories’ 150,000 square-foot manufacturing, packaging and distribution center. In the audit, NSF verified that Douglas Laboratories complied with its GMP guidelines, which provide a system of processes, procedures and documentation to assure the products produced have the identity, strength, composition, quality and purity that the company claims.