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- By Rhonda Cooley
- 13 Sep 2026
An underground economy for unapproved weight-loss medications is propelled by social media fitness personalities and vendors on communication apps, according to recent findings.
Retatrutide, which remains in research studies, is being advertised by social media influencers for its alleged fat-burning effects. Followers are encouraged to contact these accounts privately for source information, while also receiving discount codes.
Additionally, a robust market exists on messaging services, where communities with numerous of participants share comparison images, injection guides and claims of next-day UK delivery. Vendors market the drug there before redirecting customers to WhatsApp for transactions.
Retatrutide is an experimental injectable developed by American pharmaceutical company Eli Lilly. The treatment targets three intestinal hormones – GLP-1, glucose-dependent insulinotropic polypeptide and glucagon. Preliminary studies suggest it could assist individuals reduce up to a quarter of their total weight. Referred to as the “triple G”, the substance is being hailed online as the successor to Ozempic.
Nevertheless, physicians and chemists have cautions that the sale of what remains an unlicensed medication in the United Kingdom is a cause for concern and could lead to individuals administering substances of uncertain source.
Several experts stated the demand for retatrutide could be linked to the increasing price of licensed slimming products such as Mounjaro.
Selling the unapproved drug on social media or messaging apps is illegal in the United Kingdom, as it is an unlicensed medication that cannot be promoted or distributed for personal consumption under the Human Medicines Regulations 2012.
Some influencers attempt to sidestep the regulations by calling to the drug as a “research chemical” or describing it as “not for human consumption”. Retatrutide is not a controlled drug, but advertising and supply can still violate medicines, marketing, and customer laws, risking fines, legal action or imprisonment.
According to the social media company, the platform has removed problematic material and prohibited related keywords and query recommendations. The organization said it was dedicated to maintaining the platform secure and allocating resources in enhancing compliance measures.
Research also found groups with up to nine thousand participants selling the experimental drug using Telegram's built-in discovery tool, which operates like a online catalog. Entering “retatrutide” immediately displays groups with numerous of members, filled with photos of weight loss, glowing testimonials and step-by-step instructions for preparing or injecting at residence.
After moments of joining one community, a seller posted contact information, where the majority of purchases occur. The vendor provided an instruction manual and promised delivery within two days. When asked whether the substance was genuine, one vendor said: “You can’t be sure.” Another provided a photo of a alleged laboratory certificate. Not one asked about weight, medical conditions or previous experience.
Inside these groups, messages show dark colored parcels with postal service stickers, stating to contain new batches. One communication read: “It took eight of us to load them this morning.”
Customers can choose between powder vials, mixed at residence with sterile water, or pre-filled injectors typically sold at £160 for 20 milligrams. When asked how long a pen should be used, vendors give contradictory answers ranging from a few weeks to “depends on your body”.
A spokesperson for Telegram stated it regularly moderated dangerous material on its platform including material that encouraged the “misuse of controlled medications”. The organization noted that it eliminated “millions of pieces of harmful content each day”.
“Individuals are administering materials they cannot confirm. Even if the research behind retatrutide is valid, these digital products may not contain what they claim,” said a pharmacy expert, the head of pharmaceutical services at Chemist4U.
A medical professional of an online medical service linked the increase in demand to current cost increases for authorized weight-loss medications such as Mounjaro. “With prices rising, patients are using online platforms. But fake injections are highly risky. You can’t be certain what’s inside or whether the conditions they were produced in was sterile,” she said.
Her staff has previously encountered individuals injured by self-injection from unverified suppliers. “We understand the disappointment, but purchasing from messaging apps or communication platforms is gambling with your health,” said the doctor. “These materials could be contaminated or incorrectly dosed.”
A representative from Eli Lilly said retatrutide was in phase 3 clinical trials and had not been reviewed or approved by any government authority anywhere in the world. “Therefore at this time no one can market [it] for personal consumption,” they said, noting that any item “falsely representing itself as a Lilly investigational product not yet approved … may subject patients to possibly serious medical dangers”.