What Is GLP-1? The Complete Beginner's Guide to Weight Loss Medications
If you have heard about Ozempic, Wegovy, or Mounjaro but are not sure what they actually are or how they work, this guide is for you. No medical jargon, just clear answers.
GLP-1 medications have transformed weight loss treatment. Names like semaglutide, tirzepatide, and retatrutide are in headlines daily. But what are these medications, really? How do they work? Are they safe? And could they help you? This guide answers every beginner question about GLP-1 weight loss medications in plain language.
Medical Disclaimer
This guide is for educational purposes only and does not constitute medical advice. Consult a licensed healthcare provider to determine if GLP-1 medication is appropriate for you.
What Is GLP-1?
GLP-1 stands for Glucagon-Like Peptide-1. It is a hormone your body naturally produces in your intestines after eating. This hormone does several important things: it signals your brain that you are full, it tells your stomach to slow down digestion, it stimulates insulin release to manage blood sugar, and it reduces glucagon (a hormone that raises blood sugar). GLP-1 medications are synthetic versions of this hormone, designed to be longer-lasting and more potent than your body's natural GLP-1.
How GLP-1 Medications Work
- Appetite reduction: Acts on brain centers that control hunger, reducing the desire to eat
- Slower digestion: Food stays in your stomach longer, making you feel satisfied with less
- Reduced cravings: Many patients report that food noise (constant thoughts about food) quiets dramatically
- Blood sugar control: Improves insulin sensitivity and glucose regulation
- Cardiovascular benefits: Research shows reduced risk of heart attack and stroke
The GLP-1 Medications Available
Semaglutide
The most well-known GLP-1 medication, marketed as Ozempic (for diabetes) and Wegovy (for weight loss). Also available as compounded semaglutide at significantly lower cost. Clinical trials show average weight loss of 15 to 17 percent of body weight. Weekly injection. Starting cost from $99/mo compounded at Trimi.
Tirzepatide
A dual-action medication targeting both GLP-1 and GIP receptors. Marketed as Mounjaro (for diabetes) and Zepbound (for weight loss). Also available as compounded tirzepatide. Shows higher average weight loss of 20 to 25 percent. Weekly injection. From $125/mo compounded at Trimi.
Retatrutide
The newest option, targeting three receptors (GLP-1, GIP, and glucagon). Early clinical data shows up to 24 percent weight loss. Available from select providers including Trimi.
Common Side Effects
The most common side effects are gastrointestinal: nausea (especially in the first few weeks and after dose increases), reduced appetite (this is how the medication works), constipation or diarrhea, and occasionally vomiting. Most side effects are mild to moderate and improve over time. Serious but rare side effects include pancreatitis, gallbladder issues, and gastroparesis. Your provider monitors for these during treatment.
Who Qualifies for GLP-1 Treatment
GLP-1 medications are generally prescribed for adults with a BMI of 30 or above (obesity), or adults with a BMI of 27 or above with at least one weight-related health condition such as type 2 diabetes, high blood pressure, high cholesterol, or sleep apnea. Check if you are a candidate.
What It Costs
Cost Comparison
| Option | Monthly Cost |
|---|---|
| Brand-name (without insurance) | $1,000-$1,600 |
| Brand-name (with insurance) | $0-$300 (if covered) |
| Trimi compounded semaglutide | $99 |
| Trimi compounded tirzepatide | $125 |
How to Get Started
Getting started with GLP-1 treatment is simpler than most people expect. Complete a health profile online with a telehealth provider. A licensed medical provider reviews your information and determines if treatment is appropriate. If approved, medication is prescribed and shipped to your door. You begin with a low dose and gradually increase. Your provider monitors your progress and adjusts as needed. The entire process from signup to first injection typically takes 5 to 10 days.
The Bottom Line
GLP-1 medications represent the most significant advancement in weight loss treatment in decades. They work by addressing the biological drivers of obesity rather than relying on willpower alone. With compounded options making treatment accessible at $99 to $125 per month, effective weight loss medication is available to more people than ever before.
Ready to Learn More?
See if GLP-1 treatment is right for you. Semaglutide from $99/mo, tirzepatide from $125/mo.
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Sources & References
- Wilding JPH et al. Once-Weekly Semaglutide in Adults with Overweight or Obesity. NEJM 2021;384:989-1002.
- Jastreboff AM et al. Tirzepatide Once Weekly for the Treatment of Obesity. NEJM 2022;387:205-216.
- Lincoff AM et al. Semaglutide and Cardiovascular Outcomes in Obesity without Diabetes. NEJM 2023;389:2221-2232.
- FDA Prescribing Information for Wegovy (semaglutide) and Zepbound (tirzepatide).