GLP-1 receptor agonists — including semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro) — have become perhaps the most talked-about medications in medicine. Understanding what they are, how they work, and their appropriate use can help you make an informed decision about whether they might be right for you.
What Is GLP-1?
GLP-1 (glucagon-like peptide-1) is a hormone produced in the gut in response to food. It stimulates insulin secretion, suppresses glucagon (which raises blood sugar), slows gastric emptying, and — importantly — signals the brain to reduce appetite and increase satiety. GLP-1 receptor agonists are medications that mimic and amplify these effects.
Why Are They So Effective for Weight Loss?
Most weight loss interventions work by reducing caloric intake through willpower or restriction. GLP-1 agonists work differently — they reduce appetite signals in the brain, making eating less feel natural rather than forced. They also reduce 'food noise' — the constant preoccupation with food that many people experience. Clinical trials show 15-22% body weight reduction with these medications, far exceeding other pharmacological approaches.
Beyond Weight Loss
GLP-1 agonists have demonstrated significant benefits for cardiovascular disease, reducing major cardiovascular events by 20-26% in high-risk patients. Early data suggests potential benefits for Alzheimer's disease, fatty liver disease, sleep apnea, and kidney disease. These medications appear to reduce systemic inflammation broadly.
Important Considerations
- They work best as part of a comprehensive program addressing diet, exercise, and lifestyle
- Weight regain is common when medications are discontinued without lifestyle foundation
- Side effects include nausea, vomiting, and constipation, particularly early in treatment
- Muscle mass loss can occur — resistance training and adequate protein intake are essential
- Long-term data is still accumulating
GLP-1 at Alive and Well
Our weight management program incorporates GLP-1 therapies for appropriate candidates within a comprehensive functional medicine framework. We address root causes, monitor for nutrient deficiencies, and provide the lifestyle support that makes these medications most effective and sustainable. Learn more about our Medical Weight Loss Program.
