What is Semaglutide?
Semaglutide is a prescription medication used within a structured, clinician-led weight management programme. When combined with expert lifestyle support, it can help regulate appetite, reduce hunger and support steady, sustainable weight loss.
What is semaglutide?
Semaglutide is the active ingredient used in certain prescription injections for both type 2 diabetes and medical weight management. It belongs to a group of medications called GLP-1 receptor agonists.
GLP-1 (glucagon-like peptide-1) is a hormone naturally released after eating that helps regulate appetite, digestion, and blood sugar. Semaglutide mimics this hormone in a long-acting form, allowing those effects to work consistently throughout the week.
Semaglutide is administered as a once-weekly injection using a discreet, pre-filled pen and is always prescribed and monitored by a qualified clinician.
What are GLP-1 hormones and GLP-1 receptors?
GLP-1 hormones are part of the body’s natural appetite and metabolic signalling system. After eating, GLP-1 helps signal fullness to the brain, supports insulin release when blood sugar rises, and slows the passage of food from the stomach.
GLP-1 receptors are the sites in the body where this hormone acts, found in areas involved in appetite regulation and digestion. When these receptors are activated in a sustained and controlled way — as with semaglutide treatment — hunger is reduced, fullness increases, and eating behaviour becomes easier to manage.
Semaglutide, Ozempic and Wegovy explained
Some are surprised to know that semaglutide has been used in medicine for several years. Ozempic was initially developed for the treatment of type 2 diabetes and has demonstrated benefits in both blood sugar control and weight reduction. Wegovy contains the same active ingredient, semaglutide, but is formulated and licensed specifically for weight management, studied and approved for use at a higher maintenance dose. Although the core molecule is the same, the approved indications and dosing differ, which is why clinician oversight is essential.
How this medication can support weight loss
Semaglutide supports weight loss by working with your body’s natural regulatory systems:
- Reduced cravings and “food noise” — making food decisions easier
- Hunger reduction — helps you feel satisfied with less food
- Increased fullness after meals — reducing the urge to snack
- Slower gastric emptying — food stays in the stomach longer, enhancing satiety
When combined with a reduced-calorie diet and regular physical activity, these effects can contribute to meaningful and sustainable weight loss.
Clinical evidence and research
Semaglutide is one of the most rigorously studied medications in weight-management medicine.
Large, well-controlled clinical studies have shown that semaglutide, when used alongside lifestyle changes, leads to significant and sustained weight loss over time. In these programmes, participants receiving semaglutide experienced greater weight loss than those receiving lifestyle intervention alone.
Regulatory bodies such as the European Medicines Agency (EMA) describe the use of semaglutide for chronic weight management in adults with obesity or overweight who have weight-related health conditions.
Additionally, healthcare organisations such as the British Heart Foundation recognise semaglutide (marketed as Wegovy) as an effective weekly GLP-1 therapy that supports weight reduction alongside diet and activity.
While individual results vary, this body of evidence supports semaglutide’s role as an evidence-based, clinically recognised tool in weight management when used appropriately.
Who can use semaglutide?
Semaglutide for weight management is prescribed for adults who meet clinical criteria. It may be suitable if you:
Have a BMI of 30 or above, or
Have a BMI of 27 or above with at least one weight-related health condition such as type 2 diabetes, high blood pressure or sleep-apnoea
These eligibility parameters are reflected in regulatory guidance for weight management medicines like Wegovy.
A full medical assessment is always required before treatment begins. Semaglutide is not suitable for everyone, and your clinician will evaluate your health profile carefully.
How semaglutide is taken?
Semaglutide is taken once weekly, on the same day each week, using a pre-filled injection pen. The injection is given just under the skin and is designed to be simple and discreet.
Treatment typically starts at a lower dose and gradually increases over weeks, to help the body adjust and minimise side effects.
How much weight can you lose with semaglutide?
Weight loss varies between individuals and depends on factors like starting weight, how your body responds, dose progression, diet and activity levels.
Clinical research supports that many people using semaglutide alongside lifestyle changes achieve meaningful and sustained weight loss over time. This effect is consistent across a wide range of body sizes and demographics.
Importantly, the goal of treatment is safe, long-term progress, not rapid short-term loss.
What happens if you miss a dose?
If you miss a dose of semaglutide:
If fewer than five days have passed, the missed dose can usually be taken as soon as you remember.
If more than five days have passed, skip the missed dose and take your next one on the usual scheduled day.
You should not take a double dose to compensate for a missed injection. Your clinician will guide you on what to do if you miss multiple doses.
What about blood sugar?
In people without diabetes, semaglutide usually does not cause low blood sugar on its own. Missing a dose may result in increased appetite rather than a significant blood sugar change.
In people with type 2 diabetes, missing doses may affect blood sugar control, especially when semaglutide is part of a broader diabetes regimen. This is one reason personalised clinical oversight is important.
How Shape⁸supports you
At Shape⁸, semaglutide is part of a comprehensive, clinician-led weight management programme — not a standalone solution.
We support you through:
- Tailored nutrition and lifestyle support
- Clear guidance on how the medication works
- Thorough medical assessment
- Structured dose progression and monitoring
- Ongoing review and encouragement throughout your journey
Our priority is care, clarity and sustainable progress, delivered in a warm, supportive, premium clinical environment.
Useful Links
EMC - https://www.medicines.org.uk/emc/product/13803/smpc
European Medicines Society - https://www.ema.europa.eu/en/medicines/human/EPAR/wegovy
https://www.nature.com/articles/s41591-022-02026-4
