Aug 30, 2026 Understanding the Science: What Are GLP-1 Medications?
Glucagon-like peptide-1 (GLP-1) is one of our hormones, and it signals nutritional abundance to our brain, reducing our appetite. How are these new GLP-1-mimicking drugs like the Pill? New subscribers to our e-newsletter always receive a free gift. Get yours here: https://nutritionfacts.org/subscribe/. Have a question about this video? Leave it in the comment section at http://nutritionfacts.org/video/glp-1-weight-loss-drugs-like-ozempic-semaglutide-how-do-they-work-are-they-effective and someone on the NutritionFacts.org team will try to answer it. Want to get a list of links to all the scientific sources used in this video? Click on Sources Cited at https://nutritionfacts.org/video/glp-1-weight-loss-drugs-like-ozempic-semaglutide-how-do-they-work-are-they-effective. You’ll also find a transcript and acknowledgements for the video, my blog and speaking tour schedule, and an easy way to search (by translated language even) through our videos spanning more than 2,000 health topics. Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution! -Michael Greger, MD FACLM Captions for this video are available in several languages; you can find yours in the video settings. View important information about our translated resources: https://nutritionfacts.org/translations-info/ https://NutritionFacts.org • Subscribe: https://nutritionfacts.org/subscribe • Donate: https://nutritionfacts.org/donate • Podcast : https://nutritionfacts.org/audio • Books: https://nutritionfacts.org/books • Shop: https://drgreger.org • Facebook: https://www.facebook.com/NutritionFacts.org • Twitter: https://twitter.com/nutrition_facts • Instagram: https://www.instagram.com/nutrition_facts_org
For decades, doctors have sought ways to replicate or enhance this natural process. The resulting pharmaceuticals are the GLP-1 receptor agonists. These medications are designed to mimic the action of the natural hormone, making them highly effective tools for managing metabolic disorders.
How Do GLP-1 Agonists Work?
The mechanism of action of GLP-1 agonists is multifaceted, which accounts for their broad range of benefits. They do not simply lower blood sugar; they act on several fronts:
- Insulin Secretion: They stimulate the beta cells in the pancreas to release insulin only when blood glucose levels are high, making the response highly targeted.
- Glucagon Suppression: They help suppress the release of glucagon, a hormone that raises blood sugar, thereby stabilizing glucose levels.
- Gastric Emptying: Many of these medications slow down the rate at which the stomach empties its contents. This controlled, slower digestion process leads to increased satiety (the feeling of fullness), which is a cornerstone of effective weight management.
- Appetite Regulation: By influencing gut hormones and signaling fullness, GLP-1 agonists are powerful appetite suppressants, making weight loss a primary benefit.
