What is a GLP-1, really?
A plain-English guide to the class of medications behind the last few years of weight-care headlines — and how the two most common molecules, semaglutide and tirzepatide, actually differ.
The short version
GLP-1 stands for glucagon-like peptide-1, a hormone your gut releases after you eat. It tells your pancreas to release insulin, tells your stomach to empty more slowly, and tells your brain that you're satisfied. GLP-1 medications are lab-made versions of that hormone that stay in your system for days instead of minutes — so the "I'm full" signal stays on long enough to reshape how much you actually eat.
In practice, most patients describe it as "food noise turning down." Cravings quiet. Portion sizes shrink on their own. Snacking loses its pull.
How they work in the body
- Appetite regulationActs on receptors in the brain that govern hunger and satiety.
- Slower gastric emptyingFood leaves the stomach more gradually, so you feel full longer after meals.
- Insulin & blood sugarTriggers insulin release when glucose rises and reduces glucose production by the liver.
- Metabolic effectsSome GLP-1s also improve insulin sensitivity, which supports steadier energy day-to-day.
Semaglutide vs. Tirzepatide
So which one is right for me?
Honestly, that's a conversation. A responsible answer depends on your starting point, other medications, how your body handles the first few weeks, and what "success" looks like for you. Our clinicians pick a starting molecule and dose with you — and adjust based on how you actually feel, not a preset schedule.
Compounded semaglutide and tirzepatide are not FDA-approved. They are prepared by a licensed compounding pharmacy from a valid prescription written by a licensed provider.
