How Much Weight Can You Lose on Semaglutide? Real Numbers from Real Trials

By Brandon Phillips — May 19, 2026

What semaglutide weight loss really looks like at 1, 3, 6, and 12 months — based on STEP trial data and our patients' real outcomes.

The most cited number is 15% of body weight at one year. That comes from the STEP-1 trial of semaglutide 2.4 mg (the dose used in Wegovy®). For a 220-pound person, that's about 33 pounds.

But the average hides a wide range. Here's what the published data — and the patients we treat — actually look like.

The honest answer, by time on treatment

These are averages. About 1 in 3 patients lose more than 20%. About 1 in 7 lose less than 5% — these are typically called "non-responders" and your physician will usually adjust your protocol within the first 3–4 months if you're tracking below expected.

Why your number will be different

Five things move the curve:

1. Starting BMI. Higher starting weight = larger absolute pounds lost, but similar percentage.
2. Diabetes status. Patients with type 2 diabetes lose ~30% less weight on semaglutide than non-diabetic patients on the same dose.
3. Adherence. Missing doses, dropping back to a lower maintenance dose, or stopping early all reduce results dramatically.
4. Nutrition support. STEP-1 patients had monthly counseling. Patients without any structured nutrition lose less.
5. Activity level. Resistance training preserves lean mass, which keeps your metabolism higher as you lose weight.

The plateau — and what to do about it

Most patients hit a weight plateau between months 9 and 14. Your body is defending its new set point. Three options your physician will consider:

• Push the dose (if you're not already at 2.4 mg).
• Switch to tirzepatide for the dual-receptor effect — see our tirzepatide vs semaglutide comparison.
• Combine with structured nutrition and resistance training before changing medication.

What happens if you stop

The STEP-4 trial answered this clearly. Patients who reached week 20 on semaglutide and then switched to placebo regained two-thirds of their lost weight within a year. Patients who stayed on semaglutide kept losing.

This is why GLP-1 therapy is best understood as long-term metabolic support, not a temporary intervention. Maintenance dosing — sometimes at a lower dose — is usually how patients keep results.

What semaglutide costs at GOAL.MD

GOAL.MD offers semaglutide three ways:

• Compounded semaglutide — physician-supervised treatment cycles at $297/month.
• Brand-name Wegovy® — accessed via NovoCare/TrumpRx with our $95/month physician oversight.
• Semaglutide micro-dose — lower-dose program from $197/month for patients new to GLP-1s or sensitive to side effects.

See the GLP-1 program comparison for the full breakdown.

Realistic expectations checklist

• ✅ 10–15% body weight loss at 12 months is the norm.
• ✅ The first 3 months are the slowest visible progress.
• ✅ You will hit a plateau. Plan for it.
• ✅ Side effects peak with each dose increase, then fade.
• ✅ Resistance training during weight loss preserves lean mass.

Medically Reviewed

Medically Reviewed by

Dr. Michael “Ted” Mimlitz, MD

Internal Medicine, Telehealth & Wellness

NPI: 1508891870
· Reviewed May 19, 2026

Reviewed on behalf of Pro Medical Reviews, LLC (NPI 1477321198).
Questions? Contact customer@jellyfish.md.

References

1. Wilding JPH et al. "Once-Weekly Semaglutide in Adults with Overweight or Obesity" (STEP 1). N Engl J Med. 2021;384:989–1002. Link
2. FDA Prescribing Information — Wegovy (semaglutide) injection. Link
3. American Gastroenterological Association. "Pharmacological Interventions for Adults with Obesity." Gastroenterology. 2022. Link

This article is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before starting any treatment.

Medically reviewed by Dr. Michael Mimlitz, MD (NPI 1508891870), Chief Physician of GOAL.MD. Physician-supervised telehealth. More at goal.md/blog.