A 201-level at how GLP-1 drugs lead to appetite reduction

GLP-1 helps reduce obesity through a number of mechanisms

Clinical studies show GLP-1 drugs, including semaglutide, promote weight loss through a number of effects. These include reduced appetite, slower emptying of the digestive tract, increased insulin production, and more.

Semaglutides trigger the release of the appetite-suppressing hormone incretin

We've all heard about these new weight loss drugs. But what are they actually doing inside the human body to help people manage their weight? Health news site STAT has created a clear, concise video that explains what GLP-1 RAs are and how semaglutide works.

What do people do once GLP-1 medications succeed at weight loss?

The drugs have been adopted by 1 in 8 Americans, with many achieving their prescribed weight loss. They now face the question of how to keep the weight off, the key issue with any weight loss program that researchers have known about for decades. Each case is unique. Some folks continue to use GLP-1s like Ozempic in minuscule doses, while others taper them off over time.

GLP-1 drugs are under investigation for treating Alzheimer's, Parkinson's, and drug addiction

Researchers are investigating GLP-1 applications for a variety of chronic conditions. One area of interest stems from how study participants using GLP-1 for diabetes and obesity reported describing less longing for wine and cigarettes while taking the medication—intriguing researchers about using the drugs for addiction applications. The drug, they theorize, could bind to receptors that mediate desire. (Some users may experience a paywall.)

GLP-1 drugs mimic a natural hormone that triggers appetite-suppressing effects

Ozempic, one of the brand names for the drug semaglutide, was originally developed in 2012, to help treat Type 2 diabetes. Among other effects, the drug mimics a naturally produced hormone known as GLP-1, which is released while eating to let our bodies know we are full.

See which GLP-1 drugs are currently approved (along with their cost)

Around 75% of prescriptions for GLP-1 drugs are used to treat diabetes, while the remainder is used for weight loss. This overview from GoodRX includes a list and overview of currently available options along with prices for each.

Debunking myths about weight loss drugs

Business Insider delves into the research on GLP-1 to highlight the good and bad aspects other stories overlook. Few make it clear that GLP-1 drugs simply don’t work for many people. This deep dive raises a number of questions about the future of GLP-1 and how they will be used.

When people stopped using GLP-1, they regained two-thirds of the weight back

Research from 2022 found that when people stopped using the injectable form of the medication, they regained up to two-thirds of lost weight within a year. The finding suggests ongoing treatment will be required for weight loss.

Food companies are exploring 'GLP-1 friendly' diet labels

Producers of foods like Healthy Choice frozen meals are placing "GLP-1 friendly" labels on their food, but there's no regulation about what that label means. Nutritionists say that GLP-1s can help reduce appetite, but healthy, balanced diets are a necessary complement to the medications. Data shows that about half of GLP-1 users quit these medications within a year and then rapidly regain weight, underscoring the importance of also prioritizing healthy eating.

GLP-1 drugs, first used to manage diabetes, were derived from Gila monster saliva

Scientists studying the barely-there feeding frequency of the Gila monster found its saliva had a hormone regulating blood sugar and appetite. Further research revealed this hormone resembled a human one known as GLP-1, giving rise to the modern wave of diabetes and weight-management drugs.

GLP-1s may lower inflammation, possibly helping to combat cognitive decline

An analysis of existing GLP-1 research, published in April 2025, indicated that GLP-1 drugs reduce inflammation, with numerous health benefits. The work notes that GLP-1s were linked with a statistically significant reduction in dementia in randomized clinical trials.

Tirzepatide: A GLP-1 drug that also acts on separate receptors to promote weight loss

Tirzepatide, like semaglutide, is a GLP-1 drug used in diabetes treatment and for weight loss. Unlike semaglutide, it also acts on glucose-dependent insulinotropic polypeptide receptors, proving a second route to reducing appetite as a means to treat diabetes and promote weight loss.

The lack of guidance on getting off GLP-1s leaves patients at risk

Dr. David Kessler, former FDA Commissioner and public health leader, explores how these drugs override the brain’s reward-driven eating habits but have notable side effects. These include developing eating disorders, muscle loss, and intestinal obstruction.

Risks of GLP-1s include health side effects, counterfeit drugs, and more

This episode interviews researchers and patients who have used semaglutide to explore some of the potential risks associated with using the drug to lose weight. These include insurance challenges, health scares related to counterfeit versions of these drugs, and some users lose their ability to enjoy food.

Diabetes drug GLP-1 is a peptide (that's what the 'P' is for)

Glucagon-like peptide-1, or GLP-1, is one of the most well-known peptides in common use. In 2024, 26.5% of all adults with diagnosed diabetes used the substance. GLP-1 was particularly popular among people with diabetes aged 50-64, followed by younger adults and then seniors aged 65+.

Medicare does not pay for GLP-1 for obesity

Coverage for GLP-1s for obesity treatment is limited. It's barred under Medicare, and it's only covered under Medicaid in 13 states as of January 2026, since states can choose whether to cover weight-loss drugs under Medicaid. Coverage with private insurers also remains limited.

Can you microdose GLP-1 agonists like Ozempic?

GLP-1 agonists like Ozempic can help with weight loss, diabetes, and anti-inflammation. For some users, normal doses are too much. So, they've started "microdosing"—taking a smaller amount than the lowest increment of the drug available. While not yet backed by clinical trials, some doctors observed positive effects for certain people.

Read the FDA's statement on concerns over compound pharmacies

GLP-1 drugs popularity for weight loss and treating diabetes, led to a significant supply shortage and the rise of compound pharmacies, which produce customized drug formulations but lack formal approval from regulators. The drugs are ostensibly the same, but manufacturing methods lead to variations in concentration, filler compounds, and more.

Telehealth demand for GLP-1s for weight loss is booming as consumers seek easier access.

Companies developing new weight loss drugs

In recent years, weight loss drugs made a tremendous amount of money for Novo Nordisk and Eli Lilly. Other companies are developing new drugs to break into the market. This piece is a concise overview of companies creating and testing new drugs, how far along they are, and what Novo Nordisk and Eli Lilly are doing to compete with these emerging rivals.

Artificial sweeteners aren't very helpful for weight loss

Research published in 2014 from a randomized controlled study found that, on average, people only lost about two pounds if they switched to consuming artificial sweeteners instead of sugar. Some individuals using artificial sweeteners also have gained weight. Scientists theorize one potential explanation for this is that the sweeteners alter gut microbiomes in ways that reduce beneficial flora that would help promote digestion.

Diabetes 101: Insulin deficiency leads to high glucose levels in the blood

Glucose, the brain's preferred energy source, enters the bloodstream when the body breaks down consumed carbohydrates. To manage this increase in readily available energy, the body releases the hormone insulin, which allows glucose to enter and fuel our cells. Without insulin, glucose remains in the blood, causing health issues.

Is metabolism related to weight loss?

Read this article to better understand metabolism and why doctors say it's only one piece in the puzzle to managing weight. Metabolism breaks down and converts what we consume into energy, which provides fuel for all of our body's functions—both...

Chemicals from the gut have complex interactions with the rest of the body

Trillions of bacteria live in our guts, producing a wide range of molecules, hormones, and more. This review underscores the immune system’s pivotal role in the microbiota–gut–brain axis. Gut microbes influence immune cells and metabolites, which in turn modulate neurodevelopment, neural signaling, mood, and neuroinflammation—highlighting immune pathways as central mediators in gut‑brain communication.

Plant hormones and growth regulators guide growth stages and responses in plants

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Opioids mimic naturally produced endorphins to dull pain

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