Good Laboratory Practice (GLP) is a quality system concerned with the organizational process and the conditions under which non-clinical health and environmental safety studies are planned, performed, monitored, recorded, archived, and reported. It was developed by the Organisation for Economic Co-operation and Development (OECD) in response to concerns about the quality and integrity of safety data submitted to regulatory authorities. GLP provides a standardized framework that ensures data quality, reliability, and mutual acceptance across member countries.
What Is GLP?
GLP is a formal set of principles that governs the conduct of non-clinical studies supporting research and marketing permits for pharmaceuticals, agrochemicals, industrial chemicals, and other regulated products. The principles cover all aspects of study conduct, from facility organization and personnel qualifications to equipment calibration, data recording, and final report preparation. Adherence to GLP is mandatory for studies whose data will be submitted to regulatory agencies such as the FDA or EMA.
Regulatory Requirements
The cornerstone of GLP regulation is the OECD Principles of Good Laboratory Practice (revised in 1997 and updated periodically), which serve as the international benchmark. Individual countries implement these principles through national legislation, such as 21 CFR Part 58 in the United States and Directive 2004/10/EC in the European Union. Compliance is verified through periodic inspections conducted by national GLP monitoring authorities and study-based audits.
Implementation
Implementing GLP requires a comprehensive quality system that includes documented Standard Operating Procedures (SOPs) , a dedicated Quality Assurance Unit (QAU) , and clearly defined roles for study directors, principal investigators, and technical staff. Organizations must invest in facility design, equipment maintenance, and personnel training to meet GLP standards. A culture of quality and attention to detail is essential for successful implementation.
Documentation
Documentation is the backbone of GLP compliance, requiring that every aspect of a study be recorded in a traceable and auditable manner. Key documents include the study plan, SOPs, raw data, final reports, and correspondence related to study conduct. All records must be maintained in secure archives with controlled access for the periods specified by regulatory requirements.
Conclusion
GLP provides an internationally harmonized framework that underpins the reliability and integrity of non-clinical safety data. Compliance with GLP principles is a regulatory prerequisite for bringing new products to market and ensures public health protection. As regulations evolve, organizations must stay current with emerging requirements and continuous improvement practices.
