AOAC's Laboratory Proficiency Testing Program (LPTP) helps laboratories compete in the global marketplace by demonstrating and verifying their ability to meet the highest international standards for accuracy, reliability, and regulatory compliance. AOAC's proficiency testing programs in food microbiology, food chemistry, pesticide residues, cannabis, and hemp are all accredited. As an A2LA-accredited Proficiency Testing Provider, AOAC supports laboratories seeking to meet accreditation requirements through participation in reliable and internationally recognized proficiency testing programs. The American Association for Laboratory Accreditation (A2LA) requires accredited testing and calibration laboratories to participate in proficiency testing through accredited providers. AOAC's accredited LPTP helps laboratories satisfy these requirements while demonstrating their commitment to quality, technical competence, and continuous improvement.