What does GxP mean and how does GLP fit in?

• A. GxP stands for 'Good experimental practice' and GLP is general laboratory practice
• B. GxP refers to 'Good x Practice' quality guidelines; GLP is the GLP category for nonclinical studies
• C. GxP is 'Great x Protocol' and GLP is Good Laboratory Process
• D. GxP stands for 'Global x Protocol' and GLP is clinical trial practice

Answer: (B)

GxP is an umbrella term for quality guidelines used to ensure products are consistently produced and controlled to meet quality standards. It stands for Good x Practice, where x can refer to different disciplines such as Manufacturing, Laboratory, Clinical, and so on. Good Laboratory Practice is the GLP category within GxP that governs nonclinical laboratory studies—like toxicology and pharmacology—to guarantee data integrity, reliability, and traceability for regulatory submissions. This is why the statement that GxP means Good x Practice quality guidelines and that GLP is the GLP category for nonclinical studies is the best fit. For context, other GxP categories include GMP (Good Manufacturing Practice) and GCP (Good Clinical Practice), which apply to manufacturing and clinical trials, respectively.