Understanding GLP-1 Medications
Megan Hatch, MD, Family Medicine, Livingston HealthCare
GLP-1 medications have become one of the most talked-about topics in healthcare. Many people recognize the brand names, but there is often confusion about what these medications do, who they are designed for, and how to use them safely.
GLP-1 medications can be powerful tools, but they are not meant to replace nutrition, exercise, sleep, mental health care, or medical guidance. Ideally, they are used as part of a comprehensive approach that includes working with a healthcare provider and, when available, a dietitian and trainer or physical therapist.
What Are GLP-1 Medications?
GLP-1 stands for glucagon-like peptide-1, a hormone that our bodies naturally produce after we eat. This hormone helps regulate blood sugar, signals fullness to the brain, and slows the emptying of the stomach. GLP-1 medications mimic some of these natural effects, helping people feel satisfied with less food while also improving the body's ability to manage blood sugar.
These medications were originally developed to help manage Type 2 diabetes, but researchers also recognized their effectiveness in supporting weight loss for certain individuals. Today, some GLP-1 medications are approved for diabetes management, while others are approved for chronic weight management, among other conditions, in people who meet specific medical criteria.
Who Should Consider a GLP-1?
One common misconception is that GLP-1 medications are appropriate for anyone who wants to lose a few pounds. In reality, they are generally intended for people with obesity or certain weight-related health conditions in whom excess weight is contributing to health risks. They may also be appropriate for people with Type 2 diabetes who would benefit from improved blood sugar control.
Determining whether a GLP-1 medication is right for you involves more than looking at the number on the scale. A healthcare provider should review your medical history, medications, current health, risk factors, goals, and the potential benefits and risks of treatment.
It is also important to think long-term before starting treatment. Obesity is a chronic condition, and GLP-1 medications should be considered a long-term treatment rather than a short-term weight-loss medications. Weight regain is common after these medications are discontinued. The potential need for long-term treatment—including cost, access, side effects, and personal preferences—is an important part of the decision to start.
Protecting Muscle and Bone During Weight Loss
Losing weight and improving health are not necessarily the same thing. When weight is lost, the goal should ideally be to reduce excess body fat while preserving—or even building—lean muscle mass.
Some lean mass can be lost during significant weight loss, including weight loss with GLP-1 medications. This makes adequate nutrition and resistance exercise particularly important.
A baseline DEXA scan can be helpful for some patients because it provides information beyond BMI or the number on the scale. Depending on the type of scan and clinical situation, DEXA can help assess body composition, including lean mass and fat mass, as well as bone mineral density. Repeating these measurements over time may help show whether someone is primarily losing fat while maintaining or increasing muscle.
Rather than focusing exclusively on BMI, we can ask a more meaningful question: Are we improving body composition and overall health?
Maintaining muscle requires intentional effort. Adequate protein intake is important, and strength or resistance training should ideally begin or continue while taking a GLP-1 medication. A dietitian can help patients meet nutritional and protein needs despite a reduced appetite, while a physical therapist or qualified trainer can help develop a safe strength-training program based on an individual's starting point, injuries, mobility, and goals.
Health Is More Than Weight
Weight and metabolic health are influenced by much more than food intake. Sleep, chronic stress, mental health, medications, hormones, physical activity, relationships, and our environment can all influence our health and our ability to make sustainable changes.
For this reason, addressing mental health, stress, and sleep should be part of a comprehensive weight-management plan—not something we address only after weight loss has occurred.
The goal is not simply to eat less. It is to help the body become healthier and stronger.
Side Effects and Safety
Like all medications, GLP-1s come with potential side effects. The most common are gastrointestinal symptoms, including nausea, vomiting, diarrhea, constipation, bloating, and abdominal discomfort. These symptoms are often most noticeable when treatment begins or when doses are increased, and many patients find that they improve as their bodies adjust.
Less commonly, more serious problems can occur, including gallbladder disease and pancreatitis. Because these medications affect gastrointestinal function and slow stomach emptying, some individuals may experience significant digestive symptoms that require medical evaluation.
This is one reason ongoing communication with a healthcare provider is so important.
The Medication Is Only One Part of the Plan
The provider's role extends well beyond writing a prescription. Successful and safe use of GLP-1 medications begins with a thorough evaluation to determine whether treatment is appropriate. From there, we help patients understand what to expect, manage side effects, adjust medication appropriately, and monitor their health over time.
Ideally, GLP-1 treatment is a team effort involving medical care, nutrition support, and individualized movement and strength training.
And weight loss alone is not the only measure of success. We can follow blood pressure, blood sugar, cholesterol, and other metabolic markers, but we can also look at lean muscle mass, fat mass, strength, fitness, sleep, energy, mental health, and overall quality of life.
The goal should not simply be to reach a smaller number on the scale. The goal is to improve your health, strength, and well-being in a way that can be sustained over time.
GLP-1 medications are one piece of a comprehensive health plan, not the entire plan. If you are considering a GLP-1 medication, schedule an appointment with your healthcare provider to discuss your individual risks and benefits, your long-term goals, and whether this treatment is right for you. Together, you can build a team and a comprehensive plan to support you throughout your health journey.