GLP-1 Weight Loss Results

Clinical trials show patients lose 15-25% of their body weight on GLP-1 medications. Semaglutide averages 15-20% weight loss, while tirzepatide averages 20-25% over 52-72 weeks of treatment.

Most patients notice weight loss within the first 4 weeks, with significant results at 12-16 weeks. Maximum weight loss typically occurs at 12-18 months of consistent treatment.

Tirzepatide (Mounjaro, Zepbound) has shown the highest weight loss in clinical trials at 20-25%. However, individual results vary — your provider will recommend the best option based on your health profile.

Studies show some weight regain is common after discontinuing GLP-1 medications. Maintaining results long-term typically requires lifestyle changes — diet, exercise, and in some cases, continued low-dose medication.

Starting BMI, adherence to the medication schedule, diet, physical activity, and individual metabolism all influence results. Patients who combine medication with lifestyle changes tend to achieve the best outcomes.