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How fast will I lose weight on GLP-1s and is it sustainable?

ClaudevalidationCollected Jul 25, 2026, 12:36 UTC

Verbatim response from Claude

Weight Loss on GLP-1 Medications

Typical Timeline

  • First 1-3 months: 1-2 lbs per week is common as your body adjusts
  • Months 3-12: Gradual slowing, but continued loss
  • Overall: Most people lose 15-22% of body weight over 12-18 months at full dose

Specific Drug Comparisons

  • Wegovy (semaglutide) - Clinical trials showed ~15% average body weight loss
  • Zepbound (tirzepatide) - Currently the strongest option, showing ~20-22% average loss in trials
  • Ozempic - Primarily a diabetes drug but widely used off-label, slightly less weight loss than Wegovy

Is It Sustainable? The Honest Answer

The catch: Most people regain significant weight (often 2/3 of what was lost) within 1-2 years of stopping the medication.

What helps make it more sustainable:

  • Using the time on medication to build genuine habit changes
  • Strength training to preserve muscle mass
  • Working with a dietitian
  • Programs like Calibrate or Found that bundle lifestyle coaching with prescriptions

Bottom Line

GLP-1s work well but are likely a long-term or permanent commitment for most people to maintain results. Talk to your doctor about realistic expectations for your situation.

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