What Is Semaglutide?
TL;DR: Semaglutide is an FDA-approved GLP-1 medication (sold as Ozempic, Wegovy, and Rybelsus) that reduces appetite and blood sugar spikes — it is a prescription drug, not a casual research chemical, and it comes with a boxed safety warning.
Semaglutide belongs to a class of drugs called GLP-1 receptor agonists. It mimics a naturally occurring gut hormone (glucagon-like peptide-1) that regulates insulin release, slows digestion, and signals satiety to the brain. It was first approved for type 2 diabetes under the brand name Ozempic, and later approved at a higher dose for chronic weight management under the brand name Wegovy.
How It Works
By activating GLP-1 receptors, semaglutide slows how quickly food leaves the stomach and dampens appetite signals in the brain, which is why the most consistently reported effect — in both clinical trials and real-world use — is simply eating less without the same level of hunger or food noise.
An Important Note on Sourcing
Because demand for semaglutide has vastly outpaced supply at times, a market for “research use only” or compounded semaglutide has grown alongside the approved pharmaceutical product. The FDA has issued public warnings about the quality, dosing accuracy, and safety of these non-prescription products. If you’re considering semaglutide, talking to a licensed prescriber — who can order the approved product and monitor you for side effects — is the lowest-risk path.