What Is GLP-1?
GLP-1, short for glucagon-like peptide-1, is a naturally occurring hormone that helps regulate blood sugar levels, appetite, and digestion. It is produced in the intestines after eating and plays a key role in signaling the body to release insulin, slow stomach emptying, and reduce hunger.
In recent years, GLP-1 receptor agonists—a class of medications that mimic the effects of the natural GLP-1 hormone—have transformed the treatment of type 2 diabetes and obesity. These therapies have gained significant attention for their ability to improve blood sugar control while also supporting meaningful weight loss.
How Does GLP-1 Work in the Body?
After a meal, the body releases GLP-1 to help regulate glucose levels and coordinate digestion. The hormone works through several mechanisms:
- Stimulates insulin release when blood sugar levels rise
- Reduces glucagon production, which helps prevent excess glucose from entering the bloodstream
- Slows stomach emptying, helping people feel full longer
- Signals the brain to reduce appetite and food intake
Together, these effects help manage blood sugar levels and support weight management.
What are GLP-1 Receptor Agonists?
GLP-1 receptor agonists are prescription medications designed to mimic the action of the body’s natural GLP-1 hormone. Because natural GLP-1 breaks down quickly, these medications are engineered to remain active longer and provide sustained therapeutic effects.
GLP-1 therapies are commonly prescribed for:
- Type 2 diabetes
- Obesity
- Chronic weight management
- Certain cardiovascular risk reduction indications
- Obstructive sleep apnea
Several GLP-1 medications are administered as weekly injections, while others are available as daily injections or oral formulations.
What are Some Common GLP-1 Medications?
Examples of GLP-1 receptor agonists include:
- Semaglutide, under brand names Ozempic, Wegovy, and Rybelsus
- Tirzepatide, under brand names Mounjaro* and Zepbound*
- Dulaglutide, under brand name Trulicity
- Liraglutide, under brand name Victoza
*While tirzepatide is technically a dual GIP/GLP-1 receptor agonist rather than a pure GLP-1 agonist, it is often discussed alongside GLP-1 therapies because of its similar clinical applications.
Why Have GLP-1 Drugs Become so Popular?
GLP-1 therapies have attracted significant attention because they address two major public health challenges: diabetes and obesity. Clinical studies have shown that many GLP-1 medications can:
- Improve blood glucose control
- Promote substantial weight loss
- Reduce cardiovascular risk in certain patient populations
- Improve metabolic health outcomes
- Support long-term chronic disease management
