Why weight loss can stall at 2.5mg, 5mg, or 7.5mg
Tirzepatide (Mounjaro) works by acting on GLP-1 and GIP appetite-regulating pathways, helping many people feel fuller sooner and reducing what is sometimes called food noise. Even so, the response at any given dose varies considerably from person to person.
The body is still adjusting
Lower doses — 2.5mg and 5mg in particular — are often starting or transitional doses. For many people, meaningful appetite suppression builds gradually as the dose is titrated upward under prescriber guidance. Seeing little change in weight at these early stages is not unusual and does not mean the treatment is failing.
Energy intake may have crept up without realising
Reduced appetite can be subtle and inconsistent, especially early on. Some people find their food intake has not changed as much as they assumed, or that they are compensating without noticing — for example, choosing higher-calorie foods in smaller volumes. Tracking what you eat accurately tends to reveal patterns that are easy to miss otherwise.
The scale is not the only measure of change
Body composition can shift — some people lose centimetres from measurements before the scale moves, or lose fat while retaining or gaining lean mass. Water retention, hormonal cycles, and digestive changes (Mounjaro commonly slows gastric emptying) can all cause the number on the scale to fluctuate or stay flat temporarily.
Other factors your prescriber may consider
Sleep quality, stress levels, activity, and underlying health conditions can all influence how the body responds to treatment. If you are not seeing progress at the 5mg or 7.5mg stage, this is worth discussing with your prescriber — they can review whether your dose, lifestyle factors, or anything else needs to change. Any decision about your dose is theirs to make, not yours alone.
If appetite suppression feels weaker than expected, the experiences shared in reviews around the still-hungry-on-Mounjaro 5mg question may also be relevant context to bring to that conversation.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
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When weight loss is not happening as expected, having an accurate record of your doses, food, and progress is one of the most useful things you can bring to your prescriber. GLP Trackr is built to make that record as complete and effortless as possible.
Dose logging as your starting point
The dose logging feature lets you record every injection — the date, dose strength, and time — so you and your prescriber can see exactly what your treatment history looks like. If you have missed doses, or if the timing has been inconsistent, that pattern becomes visible rather than guesswork.
Food and weight data in the same place
GLP Trackr's AI photo scan lets you log a meal by pointing your camera at it — useful when appetite is low and manual logging feels like effort. Alongside that, the weight and body tracking charts show your trend over weeks rather than fixating on a single weigh-in, which is a much clearer picture of what is actually happening.
Together, these logs give your prescriber concrete information to work with — far more useful than a vague sense that things are not going to plan. You can find a fuller overview of dose management in the Mounjaro 5mg guide.
Always follow the guidance of your prescriber or doctor — they know your full medical history and are the right person to decide whether your current dose, plan, or approach needs adjusting. GLP Trackr helps you record this so you can have that conversation with confidence; it is not a substitute for their advice.
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Frequently asked questions.
Weight loss at the 5mg dose can be slow or absent for many people — 5mg is often a transitional dose, and the full appetite-suppressing effect tends to build as the dose is titrated. Energy intake, sleep, stress, and body composition changes can all affect the scale. Discuss a lack of progress with your prescriber.
Yes, it is common. The 2.5mg dose is typically a starting dose used while the body adjusts, not a therapeutic target dose for weight loss. Many people see little change at this stage. Your prescriber will guide any dose adjustment based on your individual response and tolerability.
It is possible. Body composition can shift — measurements, how clothes fit, and energy levels can all change before the scale reflects it. Water retention and digestive changes, both common on tirzepatide, can also temporarily mask fat loss. Tracking measurements alongside weight gives a fuller picture.
Any decision about your dose must be made by your prescriber, not on your own. If you feel the current dose is not working, log your progress accurately and raise it at your next appointment. Your prescriber will advise whether a dose change is appropriate for you.
GLP Trackr lets you log every dose, track your food intake, and monitor your weight trend over time in one place. This record helps you and your prescriber identify patterns — such as missed doses or calorie creep — and make informed decisions about your next steps.