What Meds Are GLP-1? A Comprehensive Look at GLP-1 Agonists

Last reviewed: June 6, 2026

Last updated: June 6, 2026

Written by: Jay Hastings, CEO of PlexusDx

Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations. He has more than 20 years of experience across healthcare innovation, genomics, laboratory operations, healthcare investing, and strategic finance.

Medically reviewed by: Jayden Lee, PharmD, EMBA

Jayden Lee, PharmD, EMBA, is the PlexusDx Medical Science Liaison with a PharmD and MBA specializing in pharmacogenomics and clinical product development, with a proven ability to bridge the gap between genomic research and practical patient outcomes. Dr. Lee has more than 10 years of professional experience in clinical pharmacy, academia, and research.

This article is part of the PlexusDx Education Hub — science-backed guidance on GLP-1 medications, metabolic health, and precision weight management.

GLP-1 agonists have become one of the most discussed medication classes for weight management and metabolic health. These injectable and oral medications work by activating GLP-1 receptors throughout your body, triggering signals in the brain that reduce hunger and slow stomach emptying. PlexusDx specializes in providing access to compounded GLP-1 agonists from licensed 503A pharmacies, serving all 50 states with transparent, flat monthly pricing.

What Are GLP-1 Agonists and How Do They Work

GLP-1 agonists are synthetic versions of glucagon-like peptide-1, a naturally occurring hormone your intestines release after eating. This hormone signals your pancreas to release insulin when blood sugar rises, and it also communicates directly with your brain's appetite centers to reduce hunger and increase fullness. When you take a GLP-1 agonist medication, it binds to GLP-1 receptors in multiple organs, mimicking your body's natural appetite-suppressing system.

The weight loss effect happens through several mechanisms working together. GLP-1 agonists slow how quickly food moves through your stomach, meaning you feel satisfied longer after smaller meals. They also increase the brain signals that tell you to stop eating, and some research suggests they may increase energy expenditure during physical activity. Most patients experience reduced cravings for high-calorie foods and a natural decrease in overall calorie intake without feeling deprived.

Unlike older diet pills that stimulate the central nervous system, GLP-1 agonists target the body's natural metabolic pathways. This mechanism explains why these medications have shown effectiveness in clinical trials—they work with your body's existing hormone systems rather than forcing weight loss through stimulation or restriction.

Types of GLP-1 Medications Available Today

Semaglutide and tirzepatide are the two primary GLP-1 agonist compounds available through compounding pharmacies. Semaglutide activates only the GLP-1 receptor, while tirzepatide is a GIP/GLP-1 receptor agonist, meaning it activates two related hormone receptors for potentially enhanced appetite suppression. PlexusDx offers both medications in injectable and oral formulations to match individual preferences and lifestyle needs.

Injectable versions of semaglutide and tirzepatide typically work faster and require once-weekly dosing, making them convenient for people with busy schedules. Oral formulations provide an alternative for patients who prefer avoiding needles, though they must be taken on an empty stomach with specific timing requirements. PlexusDx compounded semaglutide injection starts at $149 per month, while compounded tirzepatide injection begins at $249 per month, with flat pricing across all dose levels.

For patients seeking dual-action effects, PlexusDx offers GLP-Squared, a compounded injection combining semaglutide and tirzepatide in one formulation. This approach allows for synergistic receptor activation, starting at $249 per month for the injection version. The microdose GLP-1 protocol is also available at $129 per month for those preferring a gentler introduction to GLP-1 therapy.

Clinical Evidence Behind GLP-1 Agonist Weight Loss Results

Major clinical trials have demonstrated significant weight loss with GLP-1 agonists. The SUSTAIN trials for semaglutide showed patients lost an average of 5% to 15% of their body weight over 68 weeks, depending on dose and individual factors. The SURMOUNT and SELECT trials for tirzepatide showed even larger reductions, with some patients achieving 20% or greater weight loss when combined with lifestyle changes.

Beyond weight loss, these medications improve cardiometabolic markers including blood pressure, cholesterol, and blood sugar control. GLP-1 agonists have also demonstrated benefits for cardiovascular outcomes in patients with diabetes or obesity, reducing the risk of heart attack and stroke. These effects occur because GLP-1 receptors exist throughout the cardiovascular system, not just in appetite centers.

Individual results vary significantly based on genetics, lifestyle, starting weight, and medication compliance. This is why PlexusDx offers the Precision Peptide Genetic Test, which analyzes 14 metabolic pathways involving 49 peptides to identify your genetic predispositions for GLP-1 response. Testing costs $99 after your first month of treatment and can help predict which compound and approach may work best for your unique biology.

Getting GLP-1 Treatment Through PlexusDx Without Insurance

PlexusDx eliminates insurance requirements and membership fees, making GLP-1 agonists accessible to anyone with a valid prescription. All medications come from licensed 503A compounding pharmacies, ensuring pharmaceutical-grade quality and safety standards. PlexusDx serves all 50 states and accepts HSA and FSA funds for qualified healthcare expenses.

The pricing structure emphasizes transparency and affordability. Compounded semaglutide injection starts at $149 per month regardless of your current dose, meaning your dose can increase as your body adjusts without your monthly cost changing. This flat-pricing model contrasts with dose-ladder systems that charge more as medication strength increases. Most patients start with lower doses and titrate upward over several weeks or months under medical supervision provided by PlexusDx's licensed practitioners.

How Your Genetics Influence GLP-1 Response

Not everyone responds to GLP-1 medications the same way. Genetic variants — including GIPR rs1800437, GLP1R rs6923761, FTO rs9939609, and MC4R rs17782313 — influence how your body processes these medications, how much weight you lose, and how you tolerate side effects. PlexusDx maps 14 pathways, 49 peptides, and 150+ genetic insights to match each patient to the right medication, dose, and lifestyle protocol for their biology. The PlexusDx Precision Peptide Genetic Test ($99 add-on after your first month of treatment) gives your provider precise insight into your peptide genetic predispositions before the first prescription is written.

Access Personalized GLP-1 Care Through PlexusDx

PlexusDx offers six prescription GLP-1 protocols to all 50 states — no membership, no insurance required, async intake or live consult. The Semaglutide Injection starts at $149/mo. Medications are dispensed from licensed 503A compounding pharmacies following strict quality and safety standards. Add a Precision Peptide Genetic Test for $99 to personalize your protocol from day one.

Frequently Asked Questions

Are GLP-1 medications the same as insulin or diabetes drugs?

No. While GLP-1 agonists help regulate blood sugar like some diabetes medications, they work through different mechanisms and were developed specifically for appetite suppression and weight management. GLP-1 agonists trigger natural hormone pathways, whereas traditional diabetes drugs often work through insulin replacement or pancreatic stimulation. PlexusDx provides GLP-1 agonists for weight loss whether or not you have diabetes.

What clinical evidence supports GLP-1 agonists for weight loss?

Multiple large clinical trials including SUSTAIN, SURMOUNT, and SELECT have demonstrated 5% to 20%+ body weight loss with GLP-1 agonists over 12 to 18 months. These trials included thousands of patients and showed consistent results across diverse populations. Benefits extend beyond weight loss to improvements in blood pressure, cholesterol, cardiovascular outcomes, and quality-of-life measures.

How much does GLP-1 treatment cost at PlexusDx?

PlexusDx compounded semaglutide injection starts at $149 per month with flat pricing regardless of dose level, meaning your price won't increase as your dose increases. Tirzepatide injection begins at $249 per month, and oral formulations are available at higher price points. All prices are transparent, no insurance is required, and HSA/FSA funds are accepted.

What side effects should I expect from GLP-1 agonists?

Common side effects include mild nausea, especially during the first few weeks, along with occasional vomiting, constipation, or diarrhea as your digestive system adjusts. These effects typically diminish over time as your body adapts. Serious side effects are rare but can include pancreatitis symptoms or severe allergic reactions, which require immediate medical attention. PlexusDx practitioners monitor your response throughout treatment.

Can genetic testing help predict if GLP-1 will work for me?

Yes. PlexusDx's Precision Peptide Genetic Test analyzes variants in GLP1R, GIPR, FTO, MC4R, and 10 other pathways to assess your genetic predisposition for GLP-1 response across 49 peptides. For $99 after your first treatment month, this test maps 150+ genetic insights that may indicate whether you'll respond strongly to GLP-1 agonists or benefit from combination therapy like GLP-Squared.

Related Reading

• Orderly Meds Glp 1
• Henry Meds Glp 1
• Direct Meds Glp 1
• Remedy Meds Glp 1

Pricing and availability current as of June 2026. Compounded GLP-1 medications are not FDA-approved drug products; they are prepared by licensed compounding pharmacies under federal compounding regulations. Compounded semaglutide and tirzepatide are not the same as Wegovy, Ozempic, Zepbound, or Mounjaro. This article is for informational purposes only and does not constitute medical advice. Consult a licensed healthcare provider before starting, stopping, or changing any medication.

Return to the PlexusDx Education Hub for more evidence-based resources on GLP-1 therapy, metabolic health, and personalized weight management.

Medical and Editorial Standards

Medical review process: This article was reviewed for medical accuracy, scientific clarity, evidence alignment, and appropriate discussion of genetics, medications, supplements, biomarkers, and health-related claims.

Sources and evidence: PlexusDx educational content is developed using peer-reviewed research, clinical literature, reputable medical references, and, where applicable, public health or regulatory guidance.

Commercial transparency: PlexusDx offers genetic testing, blood biomarker testing, personalized supplement recommendations, and related precision wellness services. Product mentions are intended to help readers understand available options and should not be interpreted as medical advice.

Important disclaimer: PlexusDx educational content is for informational purposes only and should not be used as a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about medications, supplements, genetic testing, lab testing, or health-related care.