Introduction

With so many weight loss injections available, it can be hard to know which one works best for you. The three most popular options—Zepbound, Wegovy, and Mounjaro—all deliver impressive results, but they differ in hormones, approval status, pricing, and insurance coverage.

In this 2026 guide, we’ll break down Zepbound vs Wegovy vs Mounjaro to help you understand how they compare in effectiveness, cost, and convenience.

Quick Overview

Feature	Zepbound	Wegovy	Mounjaro
Active Ingredient	Tirzepatide	Semaglutide (2.4 mg)	Tirzepatide
Hormones Targeted	GLP-1 + GIP	GLP-1 only	GLP-1 + GIP
FDA Approval For	Weight loss (2023)	Weight loss (2021)	Type 2 diabetes (2022)
Weight Loss (Avg.)	15–22.5%	10–16%	12–15% (in diabetics)
Injection Frequency	Weekly	Weekly	Weekly

Zepbound and Mounjaro contain the same ingredient (tirzepatide), but only Zepbound is FDA-approved for obesity.

How Each Medication Works

Zepbound (tirzepatide)

• Dual-action hormone (GLP-1 + GIP)

• Suppresses appetite and improves insulin sensitivity

• Enhances fat metabolism

• Designed for weight loss in non-diabetic adults

Wegovy (semaglutide)

• Activates GLP-1 receptors only

• Reduces hunger and slows digestion

• Improves blood sugar control

• Designed specifically for weight loss

Mounjaro (tirzepatide)

• Same ingredient as Zepbound

• Approved for Type 2 diabetes (not weight loss)

• Often prescribed off-label for obesity

See related: Zepbound vs Mounjaro – What’s the Difference?

Effectiveness for Weight Loss

Study	Medication	Average Weight Loss	Duration	Source
SURMOUNT-1	Zepbound	Up to 22.5%	72 weeks	NEJM Study
STEP-1	Wegovy	14.9%	68 weeks	NEJM Study
SURPASS-2	Mounjaro	12–15% (in diabetics)	40 weeks	NEJM Trial

Zepbound shows the strongest average weight loss among non-diabetic patients.

Cost and Coverage

Medication	U.S. Price	Canadian Price	Savings Program	Coverage
Zepbound	~$1,060/month	~$450–$500	Zepbound Savings	With BMI ≥30
Wegovy	~$1,349/month	~$599–$699	Wegovy Card	With BMI ≥30
Mounjaro	~$1,000+/month	~$429–$500	Mounjaro Savings	Diabetes only

If you’re using tirzepatide for weight loss, Zepbound is more likely to be covered than Mounjaro.

Side Effects

All three share similar side effects due to GLP-1 activity:

• Nausea

• Constipation

• Fatigue

• Indigestion

• Bloating

Zepbound and Mounjaro may have stronger early side effects because they also activate GIP, another metabolic hormone.

Which Should You Choose?

Choose Zepbound if:

• You want the most powerful fat loss results

• You’re non-diabetic but qualify by BMI

• You want weekly dosing and insurance coverage for obesity

Choose Wegovy if:

• You already have coverage for semaglutide

• You prefer a single-hormone option with long-term safety data

• You’ve used Ozempic before and want to switch for weight loss

Choose Mounjaro if:

• You have Type 2 diabetes

• Your insurance covers Mounjaro for diabetes, but not Zepbound

Final Thoughts

All three medications are proven to help with significant weight loss—but Zepbound offers the greatest reduction in body weight, especially in non-diabetic patients. Wegovy remains a great alternative, while Mounjaro is best for those managing both diabetes and obesity.

Zepbound = strongest overall weight loss and dual-hormone action
Wegovy = proven, accessible GLP-1 for weight management
Mounjaro = ideal for diabetic patients seeking dual benefits

Visit our products page to explore current prices, pharmacy options, and telehealth providers for each medication.