Ozempic vs. Zepbound for Men: Which GLP-1 Is Right for You?

Two drugs. Two mechanisms. Two different results profiles. If you're a man deciding between semaglutide and tirzepatide, here's the data that actually matters for your decision.

Efficacy: Tirzepatide Wins on Weight Loss

The numbers are clear from Phase 3 data:

Semaglutide 2.4mg (STEP-1): ~16.9% average weight loss at 68 weeks
Tirzepatide 15mg (SURMOUNT-1): ~22.5% average weight loss at 72 weeks

A real-world JAMA Internal Medicine study confirmed the trial data: tirzepatide produced greater weight loss than semaglutide in head-to-head comparison in clinical practice, not just controlled trials.

Side Effects: Similar but Not Identical

Both cause GI side effects (nausea, diarrhea, constipation). Tirzepatide may cause slightly more nausea during titration but may be better tolerated at maintenance. Semaglutide has a longer track record and more safety data (including cardiovascular and kidney outcome trials).

Testosterone Impact

Both improve testosterone through weight loss. The ENDO 2025 data showing testosterone normalization (53→77%) was observed across GLP-1 classes generally. Greater weight loss with tirzepatide may produce faster testosterone normalization in men with obesity-related hypogonadism.

Cardiovascular Evidence

Semaglutide has SELECT trial data showing 20% MACE reduction. Tirzepatide's cardiovascular outcome trial is still pending. If you have established cardiovascular disease, semaglutide has the stronger evidence base today.

Cost Comparison

Brand-name Wegovy: ~$1,349/month list · Brand-name Zepbound: ~$1,060/month list
Compounded semaglutide: $99-299/month · Compounded tirzepatide: $133-400/month

The Verdict for Men

If maximum weight loss is your priority and you don't have established cardiovascular disease: tirzepatide. If you have cardiovascular or kidney disease: semaglutide (evidence base). If cost is the deciding factor: compounded semaglutide (lowest available price). If you want oral options: semaglutide has a 25mg pill; tirzepatide is injection-only.

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Sources

Wilding JPH et al. STEP-1. NEJM 2021.
Jastreboff AM et al. SURMOUNT-1. NEJM 2022.
Rodriguez PJ et al. "Semaglutide vs Tirzepatide for weight loss." JAMA Intern Med. 2024.
Lincoff AM et al. SELECT trial. NEJM 2023.
ENDO 2025. Testosterone normalization data.

This page contains affiliate links. We may earn a commission when you sign up through our links at no additional cost to you. This helps support our research. We never recommend a provider solely because they pay more — our editorial process is independent. Compounded medications are not FDA-approved and are prepared by state-licensed pharmacies.