GLP questions, answered straight
No sales pitch, no jargon fog. Updated September 2026.
What is GLP compliance, and who actually needs it?
Good Laboratory Practice (GLP) is the quality system governing nonclinical safety studies whose results support regulatory submissions — pharma, biotech, agrochemicals, and industrial chemicals. If your lab generates data for FDA, EPA, or OECD member authorities, the study must run under GLP. GLP covers study management, QA, facilities, equipment, test articles, SOPs, and data integrity.
Is there a “GLP certification” you can buy from a consultant?
No — and treat any firm selling one as a red flag. GLP compliance is recognized by national GLP monitoring authorities (e.g. the FDA, or OECD MAD member authorities), which inspect facilities. Consultants and auditors can get your lab GLP-ready and audit it, but they cannot grant GLP status.
What does a GLP consultant typically do?
Independent GLP audits (facility, study, data, report), gap analyses, mock regulatory inspections, QA-unit support, SOP development, staff training, and remediation help. Many labs hire consultants for a pre-inspection audit so a real inspection has no surprises.
How much does GLP consulting cost?
Consultants rarely publish fees. Published GxP audit benchmarks put day rates around $2,250–$4,000/day (see our cost guide for sourced figures). A full GLP program build is a six-figure, multi-year investment — one documented case totaled $623,000 over 3 years.
Should I hire a consultant or just outsource studies to a GLP CRO?
If you only need occasional regulated studies, a GLP-compliant contract lab (CRO) is usually cheaper and faster. If you run studies continuously, or want control over your data and facility, building an in-house GLP program with consultant support pays off. Our consultant-vs-CRO comparison walks through the math.
What's the difference between GLP, GMP, and GCP?
GLP governs nonclinical laboratory studies (safety testing before human trials). GMP governs manufacturing of drugs and devices. GCP governs clinical trials in humans. A lab can need all three for different activities — see our GLP vs. GMP guide.
Does the FDA inspect foreign labs for GLP?
The FDA can inspect foreign facilities, and OECD's Mutual Acceptance of Data means GLP studies from member countries are generally accepted across them. Your consultant should know which regime your submissions target.
What is 21 CFR Part 58?
The FDA's Good Laboratory Practice regulation — the US rulebook for nonclinical laboratory studies. OECD GLP principles are the international equivalent. Most GLP programs align to both.
What happens if we fail a GLP inspection?
Findings are graded; you respond with corrective and preventive actions (CAPA). Serious or uncorrected findings can lead to study rejection — which is why a mock inspection first is cheap insurance.
How do I verify a GLP consultant's credentials?
Ask for named auditors with CVs, references from similar labs, and sample deliverables (redacted). Professional registrations like RQAP-GLP exist. And check our methodology for how we vet directory listings.
Can a small lab realistically become GLP-compliant?
Yes — many small labs do, often with a part-time or contracted QA function and consultant support. The cost scales with scope; the discipline doesn't have to.
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