The short version
GLP-1 is short for glucagon-like peptide-1, a hormone your body makes naturally. GLP-1 medications are designed to mimic that hormone's effects — most notably, helping regulate blood sugar and appetite. They were originally developed for type 2 diabetes, and some are now also approved for chronic weight management. A licensed healthcare provider determines whether one might be appropriate for a given person.
The hormone behind the name
GLP-1 is produced in your gut after you eat. Among other things, it signals to your pancreas, stomach, and brain — which is part of why it plays a role in both blood sugar regulation and appetite. GLP-1 medications are built to act on the same receptors that natural GLP-1 does, which is why they're often called GLP-1 receptor agonists.
Where they came from
GLP-1 medications were first developed to help manage type 2 diabetes, and several have been used for that purpose for years. Because of the effects on appetite and digestion, researchers also studied their use in weight management, and some GLP-1 medications are now specifically approved for chronic weight management in adults with certain health profiles.
What they're generally used for
Today, GLP-1 medications are commonly discussed in two contexts:
- Type 2 diabetes management, where they can help support blood sugar control.
- Chronic weight management, typically alongside changes to diet and physical activity, and under the care of a healthcare provider.
Whether either use makes sense for a specific person is a clinical decision. It depends on medical history, current health, other medications, and goals — which is why this kind of treatment is generally paired with an evaluation by a licensed healthcare professional rather than started independently.
Semaglutide and tirzepatide
Two GLP-1 medications come up most often in weight-management conversations today: semaglutide and tirzepatide. They work in related but not identical ways — tirzepatide acts on an additional receptor (GIP) alongside GLP-1. If you're trying to understand how they compare, semaglutide vs. tirzepatide walks through the differences in plain language.
Where to go from here
If you're trying to decide whether a GLP-1 might be worth discussing with a provider, it can help to first understand what happens when you start one, what side effects are commonly discussed, and how cost tends to work.