One of the most common questions from people starting GLP-1 medication is "when will I start seeing results?" The honest answer is that meaningful weight loss takes months, not weeks — and the timeline follows a predictable pattern linked to dose escalation. Here's what to expect.
The typical journey
This timeline is approximate and based on clinical trial data and common patient experiences. Individual results vary.
Month 1 (starting dose)
Minimal weight loss — typically 0–2kg. The starting dose (2.5mg Mounjaro, 0.25mg Wegovy) is primarily for tolerability, not therapeutic effect. You may notice slight appetite changes, but don't expect dramatic results. Some nausea is common as your body adjusts. This is normal — the dose will increase.
Month 2 (first escalation)
Weight loss begins — typically 1–3kg this month. As the dose increases to therapeutic levels, appetite suppression becomes more noticeable. You may find yourself eating smaller portions naturally. Side effects may briefly increase with the dose change, then settle.
Month 3 (building momentum)
Noticeable weight loss — cumulative 3–6kg by now. This is when most people start to feel a real difference. Clothes feel looser, energy may improve, and the routine of weekly (or daily for Saxenda) injection becomes second nature. Side effects typically stabilise.
Months 4–6 (peak loss period)
This is typically the fastest phase of weight loss — cumulative 6–12kg by month 6. Dose escalation continues and appetite suppression is at its strongest. You may find that your relationship with food genuinely changes — eating less doesn't feel like deprivation. This is also when health markers (blood pressure, blood sugar, cholesterol) often start improving.
Months 7–9 (continued strong loss)
Weight loss continues but may start to slow — cumulative 10–18kg by month 9. You've likely reached or are approaching your maintenance dose. The rate of loss naturally decreases as your body adapts to its new weight. This doesn't mean the medication has stopped working.
Months 10–12 (approaching plateau)
Weight loss slows further — cumulative 12–22kg by month 12. Many people reach or approach their maximum weight loss around this point. Some months you may lose very little. This is the metabolic plateau — your body has adjusted to the lower calorie intake and reduced weight.
Month 12+ (maintenance)
Weight stabilises at your new lower weight. The medication continues to work — it's maintaining the appetite suppression that keeps your weight stable. Without the medication, most people would gradually regain. Continued treatment is about maintenance, not further loss.
Why the first month feels slow
This is the most frustrating part for many people. You've started an expensive medication and after four weeks you may have lost very little. This is by design — the low starting dose exists to prevent the severe nausea that would occur if you jumped straight to a therapeutic dose. The first month is about building tolerance, not losing weight. Be patient with the process.
What if I'm not losing as expected?
If you're several months in and weight loss is significantly below what you'd expect, possible reasons include: dose may need increasing (discuss with your prescriber), dietary habits may need adjusting (the medication reduces appetite but doesn't control food choices), you may be consuming more liquid calories than you realise (alcohol, sugary drinks, smoothies), or your body may simply respond differently to the medication than the average trial participant. See our plateau troubleshooting guide.
The numbers are averages
Every number in this timeline is approximate. Some people lose faster, some slower. Some plateau earlier, some later. The overall trajectory — slow start, acceleration, peak, plateau — is consistent, but the exact amounts and timing are individual. Focus on the trend over months, not the number on any single week.