People in the UK considering weight-loss injections are being warned about a growing underground market for counterfeit products. Recent raids and official statements highlight the scale of the threat, with thousands of fake pens seized and sold through unregulated channels.
Birmingham raid seizes 12,000 counterfeit pens
On October 14, the Medicines and Healthcare products Regulatory Agency (MHRA) and West Midlands Police raided an industrial unit in Birmingham, seizing over 12,000 counterfeit weight-loss pens. The MHRA stated that these products have not been checked for safety, quality, or effectiveness.
Some packages contained retatrutide, a drug not licensed anywhere in the UK. Dr Amar Ahmed, GP partner at Wilmslow Health Centre, warned in a Facebook video: "If your weight loss jab came from anywhere other than a pharmacy, can I have 30 seconds of your time?"
Why people turn to unregulated sellers
High private prescription costs, NHS delays, and strict eligibility rules are driving many buyers toward cheaper alternatives on social media and websites. Private treatments can cost up to £2,500 a year, and a report found 51% of users cited cost as the primary reason for stopping treatment.
An Ipsos poll showed nearly one in 10 UK adults (9%) would buy weight-loss jabs via social media if they couldn't get a prescription. A survey of 2,000 GLP-1 users by MedExpress found over 20% had already bought unverified jabs, with adults aged 25 to 34 being the most vulnerable.
Health risks and financial losses
Fake injectables can contain harmful bacteria, undeclared chemicals, and dangerous substances like cement and arsenic. Many fake pens contain mislabelled insulin, which can cause severe hypoglycemic shock, coma, or death. Nearly 90% of reported adverse reactions to fake semaglutide are serious, including severe vomiting, acute pancreatitis, and dehydration.
Santander UK reported that fraud losses from fake weight-loss jab scams doubled year-over-year, with victims losing an average of £120.
How to stay safe
Legitimate prescription drugs are never sold directly on social media or general marketplaces. Check that an online provider is registered on the General Pharmaceutical Council (GPhC) register. Be suspicious of sites offering jabs without a clinical consultation or BMI verification, and inspect packaging for signs of tampering.
If your medication was dispensed by a licensed pharmacy with a prescription, you can safely continue treatment. However, if you bought a jab online or through social media, stop taking it immediately and consult a GP or pharmacist.
