Few medicines have generated as much excitement as GLP-1 medicines; however, they are not without controversy. Drugs such as Wegovy, Mounjaro and Ozempic have transformed the treatment of obesity and type 2 diabetes, helping many patients achieve blood glucose management that would previously have been extremely difficult through lifestyle changes alone.
Their rapid rise in popular culture is the interesting bit, and it has little to do with their established role in treating type 2 diabetes; rather, it has been driven by the market for cosmetic weight loss, unsafe online sales and prescribing without adequate clinical oversight or justification. The controversy is therefore not simply about whether these medicines “work”. It is about who should use them, how they should be prescribed and what happens when a legitimate medical treatment becomes a social-media trend.
GLP-1 receptor agonists basically imitate a naturally occurring hormone involved in appetite regulation, digestion and blood-glucose control. They can reduce hunger, increase feelings of fullness and slow the rate at which food is digested within the stomach.
Semaglutide is sold under different brand names. Ozempic is licensed in the UK for type 2 diabetes, while Wegovy is licensed for weight management in eligible patients. Mounjaro contains tirzepatide, which acts on both GLP-1 and GIP receptors and is licensed for type 2 diabetes and weight management. For Mounjaro the eligibility criteria are BMI of 30 kg/m² or above or BMI of 27–29.9 kg/m² if at least one other weight-related comorbidity is present like high blood pressure.
Obesity, as we all know, is a chronic health condition associated with increased risks of type 2 diabetes, cardiovascular disease, high blood pressure, sleep apnoea, joint problems and some cancers, so a long list. For an appropriately assessed patient, emphasis on the appropriately assessed part, medication forms a legitimate part of treatment alongside dietary changes, physical activity and ongoing clinical support.
In the UK, medicines such as Wegovy and Mounjaro are authorised for weight management in people who meet defined clinical criteria. The exact criteria for NHS-funded treatment may be more restrictive because eligibility is also influenced by NICE recommendations, local services and phased NHS implementation.
Using these medicines to treat clinically significant overweight or obesity is not “cheating” or misuse, and importantly it does not represent a failure of willpower. Appetite, metabolism, genetics, medication, psychological health and the surrounding environment can all influence body weight. For some patients, GLP-1 treatment provides an effective medical intervention for a condition that has resisted all previous attempts.
The issue is when the injections are used by people who are not overweight and want to lose a small amount of weight for aesthetic reasons, following social media influencers or when they are obtained without a proper clinical assessment.
The UK medicines regulator has warned that the safety and effectiveness of GLP-1 medicines have not been established for cosmetic weight loss in people who are not overweight or living with obesity. Meaning, we don’t know what it will do long-term and thus its use should be limited to when someone genuinely needs it.
The misuse comes in many forms:
All the safeguards that are meant to determine whether treatment is necessary, suitable and safe, become nullified. After all, it’s just a ‘Skinny jab’ right?
The nickname “skinny jab” is itself laughable if it wasn’t so worrying. It trivialises prescription medication and encourages the idea that treatment is a simple shortcut to the beach body we all want.
Common side effects include nausea, vomiting, diarrhoea, constipation, abdominal discomfort and fatigue. Persistent vomiting or diarrhoea can cause dehydration and may affect kidney function. Then there are some potentially serious complications, including pancreatitis, gallbladder problems, severe allergic reactions and hypoglycaemia, particularly when certain other medicines are used at the same time.
In January 2026, the Medicines and Healthcare products Regulatory Agency strengthened warnings concerning acute pancreatitis, including rare reports of severe, necrotizing and fatal cases. Severe and persistent abdominal pain especially when associated with nausea or vomiting requires urgent medical assessment.
Rapid weight loss can also involve loss of muscle as well as fat. Adequate nutrition, protein intake and appropriate physical activity therefore remain important. Treatment should not amount to simply suppressing appetite while ignoring all these other important factors.
There are additional considerations for people who are pregnant, planning pregnancy or breastfeeding. Tirzepatide may also reduce the effectiveness of oral contraception during certain periods, including after treatment begins and following dose increases. Patients must therefore receive personalised proper clinical advice rather than relying on information from social media.
We knew this was going to happen. Growing demand has created opportunities for illegal sellers. Products purchased through social media, messaging services or unverified websites may be counterfeit, incorrectly dosed, contaminated or contain an entirely different substance.
The MHRA advises that prescription weight-loss medicines should only be supplied following an appropriate assessment by a qualified healthcare professional. Patients using an online provider should check that the prescriber and supplying pharmacy are properly registered.
A professional-looking website, celebrity endorsement or before-and-after photograph does not establish that a product is genuine or that the person selling it is authorised to do so.
Responsibility for regulating this extremely fast-paced landscape is spread across a regulatory patchwork: the MHRA oversees medicines and illegal supply, the GPhC regulates pharmacies and pharmacy professionals, the CQC regulates relevant healthcare providers in England, professional regulators oversee individual prescribers, and the ASA polices advertising. There is therefore plenty of oversight on paper, but no single organisation owns the entire problem.
Nothing in this article is intended to vilify online prescription methods which in a lot of cases genuinely bridge the gap in accessibility to healthcare. Remote prescribing can be safe and convenient when appropriate controls and accountability are in place. The problem is not that an assessment takes place online; it is whether the assessment is clinically meaningful.
Responsible prescribing should include verification of the patient’s identity but also verification of relevant measurements, assessment of medical history – typically skewed as private services do not have access to NHS records and rely on the patient’s answers – and risk assessments of contraindications. Then there is the issue of a lack of follow-up such as dose-escalation instructions, safety-netting and arrangements for monitoring.
A questionnaire designed primarily to approve a sale is not equivalent to a proper clinical assessment.
Another cause for controversy concerns fairness. Demand for GLP-1 medicines has previously affected supplies for patients who depend on them for diabetes treatment. The promotion of these medicines as rapid cosmetic solutions can place additional pressure on supply and distort public understanding of their medical purpose.
At the same time, access to structured NHS weight-management treatment remains limited. This has produced a two-tier system in which some patients can obtain paid private treatment quickly while others with significant clinical need face restricted local services or lengthy waits.
That statement isn’t an indictment of people who receive private treatment, but rather a call for ensuring that prescribing standards remain consistent and that access is always based on clinical need rather than the patient’s ability to pay. After all, that was one of the founding principles of the NHS: equal and fair access to healthcare.
Does it ever stop for those who treat it as a siloed approach to weight loss? GLP-1 medicines control biological drivers of appetite while they are being used; they do not permanently remove those drivers leading some people to regain a significant proportion of the weight they lost after stopping treatment.
This does not mean the medicines have failed.
Prescribers should discuss duration, cost, treatment targets, possible weight regain and the support available if treatment is discontinued. Ongoing support should address the full range of factors that influence obesity, including diet, physical activity, metabolism, genetics, medication, psychological health and the patient’s wider environment.
The public discussion around GLP-1 medicines is often a reductive argument which polarises to two extremes. One presents them as miracle drugs capable of solving obesity; and the other portrays every user as vain, lazy or reckless.
Neither argument is accurate in my opinion.
These medicines are powerful and potentially transformative treatments, which is why I stand by describing them as a medical breakthrough. They can improve health and quality of life when prescribed to appropriate patients as part of a properly managed programme. However, like every medication they are not risk-free. Most things in life are not. Additionally, they are not suitable for everyone and definitely shouldn’t be used by people of a healthy weight who want to meet an unrealistic aesthetic ideal.
The real controversy is not medical weight loss itself. It is the conversion of serious prescription medicines into a routine consumer product. When accompanied by inadequate assessments, misleading advertising and an online culture that treats rapid weight loss as harmless, that’s when it becomes dangerous. I fear there is also a wider, unknown consequence: social media was a prominent driver of this rise in use and misuse, and it may do the same again when another treatment capable of being used for both medical and cosmetic purposes become available.
GLP-1 injections should be neither demonised nor trivialised. They should be treated for what they are: valuable medicines requiring proper assessment, informed consent, responsible prescribing and continuing clinical supervision.
So, what can we do about it? The easiest, impractical solution for any critic would be to apply more pressure to the regulators. But, like I said, they’re already stretched, so this won’t achieve much; if anything, it will cause deficiencies elsewhere. A much better approach is to fight fire with fire, misinformation with education on the same platforms which are seeking to capitalise on the insecurities of others.
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