Good Clinical Laboratory Practice
Analysis of clinical-trial specimens.
What this page does not claim
Educational orientation — not a determination of regulatory applicability, compliance, validation scope, or organizational approval.
WHAT IT GOVERNS
Good Clinical Laboratory Practice governs the analysis of specimens generated in clinical trials (WHO and MHRA GCLP) — applying the reliability disciplines of GLP to the laboratory testing of clinical-trial samples. It bridges the gap between GCP, which governs the trial, and the laboratory rigor those trial endpoints depend on.
WHY IT MATTERS
Clinical-trial conclusions frequently ride on laboratory results — a biomarker, a PK concentration, a safety assay. If the lab that generated those numbers cannot demonstrate validated methods and an intact chain of custody, the endpoint they support is exposed. GCLP is what makes clinical-trial lab data as defensible as the trial it feeds.
KEY FOCUS AREAS
Analytical method validation
Methods validated for their intended use — accuracy, precision, specificity, and range — before they generate data that will support a trial conclusion.
Specimen chain-of-custody
Documented handling, storage, and tracking of samples from collection to analysis, so every result can be tied to a known specimen under known conditions.
Instrument qualification & calibration
Analytical instruments qualified, calibrated, and maintained, with the records to prove they were fit at the time of use.
The QA framework for clinical labs
A quality system — SOPs, training, and QA oversight — that holds the clinical laboratory to a reconstructable, auditable standard.
STANDARDS SPEQ DECODES · 5
Open the full library →WHAT GOOD LOOKS LIKE
- Method validation records covering the intended analytical use
- Sample handling, storage conditions, and chain-of-custody documentation
- Result traceability from instrument output to reported value
- Personnel training and demonstrated competence for the assays run
RELATED DISCIPLINES
SECTORS THAT OPERATE UNDER GCLP
GCLP: frequently asked questions
Reference answers on Good Clinical Laboratory Practice — what it governs, what regulations define it, and what it requires.
What is Good Clinical Laboratory Practice (GCLP)?
GCLP governs the analysis of specimens generated in clinical trials — applying the reliability disciplines of GLP to the laboratory testing of clinical-trial samples. It bridges the gap between GCP, which governs the trial, and the laboratory rigor those trial endpoints depend on.
What guidance defines GCLP?
GCLP is defined by guidance from bodies including the WHO and the UK MHRA. It brings together the quality principles of GLP and the subject-protection and data-reliability requirements of GCP so that laboratory data supporting a clinical trial is as defensible as the trial itself.
What does GCLP require for analytical methods and samples?
GCLP requires methods validated for their intended use — accuracy, precision, specificity, and range — before they generate data that will support a trial conclusion, and a documented specimen chain of custody from collection to analysis. Instruments must be qualified, calibrated, and maintained, with records proving they were fit at the time of use.