GLP has two common meanings. In medicine and weight-loss searches, it usually refers to GLP-1, short for glucagon-like peptide-1, a gut hormone and the drug class that activates its receptor. In laboratory and regulatory work, GLP usually means Good Laboratory Practice, a quality system for nonclinical safety studies.
Key takeaways
- GLP-1 is a hormone and a common shorthand for a class of prescription medicines.
- Good Laboratory Practice is a system for protecting the quality and integrity of nonclinical study data.
- The two meanings are not related just because they use the same abbreviation.
- Context matters: words such as medication, weight loss, Ozempic or hormone point to GLP-1; words such as lab, study, compliance or certification point to Good Laboratory Practice.
What does GLP mean in medicine?
In a medical context, GLP usually means GLP-1, or glucagon-like peptide-1. GLP-1 is a naturally occurring hormone involved in the body's response to food. It helps regulate blood sugar and communicates with systems involved in digestion and appetite.
People also use “GLP-1” as shorthand for GLP-1 receptor agonists, a class of prescription medicines that activate the GLP-1 receptor. The class includes medicines based on semaglutide and liraglutide. Tirzepatide activates both GLP-1 and GIP receptors, so it is a dual agonist rather than a pure GLP-1 receptor agonist.
For the health meaning, see What is GLP-1? and the GLP-1 medications guide. ThinkGLP provides general education only. It does not diagnose, prescribe or decide whether a medicine is appropriate for a particular reader.
What does GLP mean in a laboratory?
In a laboratory or regulatory context, GLP usually means Good Laboratory Practice. The U.S. Food and Drug Administration describes GLP as a quality system concerned with the organization and conditions under which nonclinical health and environmental safety studies are planned, performed, monitored, recorded, archived and reported.
Good Laboratory Practice is about the reliability and traceability of study data. It is used for certain nonclinical studies, including studies that may support research or marketing applications. It is not the same as Good Manufacturing Practice, which concerns the manufacturing and quality control of products.
FDA's GLP definitions page and its information on GLP for nonclinical studies provide the regulatory context.
GLP-1 vs Good Laboratory Practice
| Term | Meaning | Typical context |
|---|---|---|
| GLP-1 | Glucagon-like peptide-1, a gut hormone and related medicine class | Health, diabetes, weight management, medications |
| GLP | Good Laboratory Practice, a quality system for nonclinical studies | Research, laboratory operations, regulatory compliance |
| GMP or cGMP | Good Manufacturing Practice or current Good Manufacturing Practice | Manufacturing, product quality and pharmaceutical production |
How can you tell which GLP meaning a search uses?
Look at the surrounding words. “GLP weight loss,” “GLP injections,” “GLP side effects” and “GLP medications” almost certainly refer to GLP-1. “GLP certification,” “GLP guidelines,” “GLP lab” and “GLP compliance” usually refer to Good Laboratory Practice.
Some searches are ambiguous. A page that says only “GLP” without context may be referring to either meaning, so a responsible explanation should identify the ambiguity before giving details.
Frequently asked questions
What does GLP stand for in medicine? +
It usually refers to GLP-1, or glucagon-like peptide-1, a gut hormone and the receptor targeted by a class of prescription medicines.
What does GLP stand for in a laboratory? +
It usually means Good Laboratory Practice, a quality system for nonclinical safety studies.
Are GLP-1 and Good Laboratory Practice the same thing? +
No. They are separate concepts that happen to share the abbreviation GLP.