Which of the following is a Good Laboratory Practice (GLP) requirement?

• A. New Animals Must Be Quarantined and Their Health Status Evaluated Prior to Use.
• B. Animals Must Be Identified Accurately.
• C. The Contaminant Levels of Food and Water Should Be Analyzed Periodically and Documented.
• D. All of the Above

Answer: (D)

GLP is about ensuring data quality and traceability in nonclinical studies. Practicing GLP means confirming animals are healthy and appropriate for use, often through quarantine and health evaluations before they enter a study. It also requires accurate identification of each animal so data can be tied to the correct subject. In addition, GLP includes controlling and documenting potential confounders like contaminants in food and water to prevent bias in results. Because all of these aspects are expected under GLP, all of the above apply.