Wegovy results before and after: what actually changes, and when

Step 1: The first four weeks, settling in, not slimming down

Wegovy treatment opens at 0.25mg weekly, a starting dose chosen to let your body adjust rather than to drive weight loss. During this first month, many people report a noticeable shift in appetite (feeling full sooner, losing interest in snacking) but the scale often moves slowly or not at all. That can feel discouraging, and it's one of the things our prescribers hear about most often from patients in the early weeks.

What's happening biologically is that semaglutide is beginning to slow gastric emptying and signal fullness through GLP-1 receptors in the brain. The dose is simply too low at this stage to produce large energy deficits. Side effects (typically nausea, loose stools or fatigue) tend to be most noticeable now and usually settle within a couple of weeks. If you want to understand the first month's experience in more detail, the page on Wegovy's first-month results goes through it closely, and you can also see what before and after looks like at the one-month mark for a sense of what early progress can realistically mean.

The practical task in week one to four is consistency: inject on the same day each week, eat slowly, stay hydrated, and let your system find its footing. The NHS medicines page for semaglutide has a clear overview of what to watch for in this phase.

Step 2: Months two to six, when the results become visible

The dose increases roughly every four weeks under prescriber review, moving through 0.5mg, 1.0mg and 1.7mg towards the 2.4mg maintenance dose. As the dose climbs, appetite suppression deepens and most people begin to see consistent weight loss, typically somewhere between 5% and 10% of starting body weight by the six-month point, though individual variation is wide.

The STEP 1 trial, published in the New England Journal of Medicine, enrolled 1,961 adults with obesity and tracked weight over 68 weeks. By around 20 weeks (roughly the five-month mark), participants on semaglutide had lost an average of about 10% of body weight; the full 15% average came by the end of the trial. This phase is also when the lifestyle component (a modest calorie reduction and regular movement) starts to compound the medicine's effect.

For a closer look at how things tend to look by the two-month mark, the Wegovy two-month results page pulls together what the data and clinical experience show. Some people reach their maintenance dose by month three or four; others titrate more slowly if side effects make the standard schedule uncomfortable. The prescriber guides that decision at each review.

Step 3: Months six to twelve and beyond, plateaus, maintenance and what sustains the loss

Weight loss with Wegovy tends to plateau as the body adapts to the lower intake. The STEP 1 trial showed the sharpest losses happening in the first 32 weeks, with a more gradual further reduction through to week 68. Around a third of participants in that trial lost more than 20% of body weight, but roughly the same proportion lost less than 10%. Averages are a guide, not a promise.

Sustained results depend on staying at the maintenance dose and maintaining the lifestyle changes put in place during titration. NICE's appraisal of semaglutide (TA875) recommends considering whether to continue treatment if less than 5% weight loss has been achieved after six months at the maintenance dose, a review that makes clinical sense because not everyone responds equally.

Stopping Wegovy typically leads to weight returning over the following months; this is not a failure but a biological reality, the same appetite signals that drove weight gain before treatment reassert themselves. Whether treatment continues, pauses or transitions to another option is a conversation between you and your prescriber. If you're weighing up the full before-and-after picture, the Wegovy weight-loss results overview covers the longer-term evidence in one place, and the Wegovy before and after page brings together real examples of how results can look across the full course of treatment.

Private treatment through a regulated weight-loss service lets you start without a waiting list, subject to clinical assessment. For context on what private Wegovy treatment typically costs, the Wegovy price page sets out what to expect. At nume, a GPhC-registered Independent Prescriber reviews every consultation (a real clinician reads your answers, not a piece of software) before anything is prescribed or dispatched.