How Much Weight Can You Lose in a Month on Mounjaro or Wegovy?

There is no single "maximum" monthly weight loss figure that applies to everyone on Mounjaro (tirzepatide) or Wegovy (semaglutide). Both are prescription-only, once-weekly injectable medicines that work on appetite-regulating pathways — GLP-1 receptors for both, and additionally GIP receptors in the case of tirzepatide — reducing hunger and increasing the sense of fullness. But how much weight shifts in any given month reflects a combination of factors that are unique to you.

Why results differ so much

• Dose stage: Early in treatment, doses are typically kept low while the body adjusts. Prescribers gradually increase the dose over time, so the first month is often at a starter dose where appetite effects are still building.
• Starting weight: People with a higher starting body weight often see larger absolute losses early on, while those closer to their target may see smaller month-to-month changes.
• Diet and protein intake: Eating enough protein and maintaining a gentle calorie deficit tends to support better results and helps preserve muscle alongside fat loss.
• Activity and sleep: Movement, sleep quality, and stress levels all influence how the body responds over time.
• Individual biology: Hormonal factors — including conditions such as PCOS — can affect the rate of loss. Many people with PCOS report that reducing insulin resistance through lifestyle changes and prescribed treatment supports progress, though timelines vary considerably.

Is a plateau normal?

Stalls and slower months are a normal part of any weight-loss journey, not a sign that something has gone wrong. Weight can fluctuate week to week due to water retention, hormonal cycles, and other factors entirely unrelated to fat loss. Looking at trends over four to six weeks gives a much more honest picture than any single weigh-in. For a closer look at shorter-term patterns, see our guide on weight loss over two weeks on GLP-1 medicines, or explore how much weight loss to expect on Mounjaro across a longer timeline.

It is also worth knowing that some patterns of weight loss can signal something worth discussing with your prescriber — rapid or unexpected loss is worth mentioning at your next appointment. For a broader overview of managing your journey, visit our weight loss tracking hub.

One of the most motivating things you can do on a GLP-1 journey is build a consistent record — because progress that feels invisible week to week often becomes clearly visible when you look back over a month of data.

GLP Trackr's weight and body tracking feature logs your weight alongside measurements and lets you see your transformation charted week by week. Rather than fixating on a single number, you get a visual trend that reflects what is actually happening — including weeks where the scale barely moves but other markers are shifting. The insights and analytics layer goes further, helping you spot correlations between your results and the habits you are logging: sleep, protein, steps, and more. If a plateau is approaching, the forecast feature can flag it before frustration sets in.

Logging daily in the morning check-in takes under a minute and keeps your record complete enough to be genuinely useful — both for your own motivation and as something concrete to bring to your prescriber appointments.

Your prescriber or doctor is the right person to guide any decisions about your treatment or progress — GLP Trackr helps you arrive at those conversations with clear, organised data rather than a rough recollection. If you are ever concerned about the pace of your weight loss, or if anything feels off, contact your healthcare professional promptly.

Start building your monthly picture today — download GLP Trackr on the App Store or Google Play and explore it free for your first 7 days.