GLP-1 medications have changed how doctors think about weight loss. They’ve also changed how I think about it, and I’ve been writing about weight loss for years.
I’m not going to pretend I understood what GLP-1 meant when I first heard it. I Googled it at 11pm after a conversation with my doctor, and I spent the next two hours reading clinical trials and Reddit threads in equal measure. This guide is what I wish had existed that night.
Here’s what you’ll find on this page: a plain-English explanation of how GLP-1 medications work, what the main options are, how to get them, what they cost, and what to realistically expect. Each section links to a deeper post if you want more detail on a specific topic.
What Is GLP-1?
GLP-1 stands for glucagon-like peptide-1. It’s a hormone your body naturally produces in your gut after you eat. Its job is to tell your brain you’re full, slow down how fast food leaves your stomach, and help regulate blood sugar.
Some people produce less of it than they need. Some people’s brains don’t respond to it as strongly. The result is a hunger signal that doesn’t turn off the way it should, which makes sustained weight loss feel impossible regardless of willpower or effort.
GLP-1 receptor agonists are medications that mimic this hormone. They bind to the same receptors, produce the same signals, and stay active far longer than the natural hormone does. The practical result is reduced hunger, smaller appetite, and for most people, meaningful weight loss.
The Main GLP-1 Medications for Weight Loss
Semaglutide (Ozempic, Wegovy) — Ozempic is FDA-approved for type 2 diabetes and commonly prescribed off-label for weight loss. Wegovy is the same molecule at a higher dose, FDA-approved specifically for weight management. Both are weekly injections.
Tirzepatide (Mounjaro, Zepbound) — A newer medication that targets both GLP-1 and GIP receptors. Mounjaro is approved for diabetes; Zepbound is approved for weight loss. Clinical trials show higher average weight loss than semaglutide, though individual results vary.
Compounded semaglutide and tirzepatide — Compounded versions are made by licensed pharmacies and are significantly less expensive than brand-name medications. They are not FDA-approved, but they are legal during periods of brand-name shortage and increasingly available through telehealth programs.
For a detailed breakdown of how these compare, read: Ozempic vs Wegovy: What’s Actually Different?
What the Research Shows
The STEP clinical trials are the most referenced data for semaglutide. In STEP 1, participants lost an average of 14.9% of body weight over 68 weeks on 2.4mg weekly semaglutide. The placebo group lost 2.4%.
The SURMOUNT trials for tirzepatide showed even higher average results, with some participants losing more than 20% of body weight.
These are averages. Some people respond more strongly. Some respond less. The medication is not a guarantee, but the data is more compelling than anything else available for weight loss.
The one consistent finding across all trials: most people regain weight when they stop the medication. This is not a character flaw. It reflects how the medication works. Your hunger signal returns when the drug is no longer active.
What to Expect Week by Week
The first weeks are about adjustment, not results. Starting doses are low on purpose. Your body needs time to adapt before doses increase.
Most people notice appetite changes around weeks 3 to 6. Side effects, primarily nausea, tend to peak in the first month and improve significantly after that.
Weight loss typically accelerates after the first month and levels off as you approach your maintenance dose. Progress is rarely linear.
Read the full breakdown here: Ozempic for Weight Loss: Does It Actually Work?
Side Effects Worth Knowing About
The most common side effects are gastrointestinal: nausea, vomiting, diarrhea, and constipation. They’re most pronounced during dose increases and tend to improve over time.
There are less common but serious risks, including pancreatitis, gallbladder problems, and thyroid concerns noted in animal studies. These are worth discussing with a doctor before starting.
Full detail: Ozempic Side Effects for Weight Loss: What to Expect
How to Get GLP-1 Medication
The traditional path runs through your primary care doctor or an endocrinologist, then a pharmacy. This path works, but it’s slow and often involves insurance battles.
The faster path is telehealth. You complete an online consultation with a licensed provider, they review your health history, and if you’re a candidate they handle the prescription and pharmacy coordination. The whole process can take days instead of months.
GobyMeds is one telehealth option worth checking. They’re transparent about pricing and work through licensed U.S. pharmacies. Use code MTVN25 for $25 off your first order.
More on the process: How to Get GLP-1 Medication Online
What Does It Cost?
Brand-name Ozempic and Wegovy retail for $900 to $1,000 per month without insurance. Insurance coverage for weight loss specifically is inconsistent and often denied.
Compounded semaglutide through telehealth typically runs $200 to $400 per month. That’s a meaningful difference and the reason most people without insurance coverage go the telehealth route.
Full cost breakdown: How Much Does Ozempic Cost for Weight Loss?
How to Choose a Program
Not all telehealth GLP-1 programs are the same. What matters: transparent pricing, licensed providers, pharmacy credentials, and follow-up support after you start.
Read the comparison: Best GLP-1 Programs Online for Weight Loss
Judy White is the founder of Motivation Weight Loss. She used GLP-1 injections as part of her own weight loss and writes from personal experience, not as a medical professional.