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- By Nicole Jackson
- 13 Sep 2026
A shadow market for unapproved weight-loss medications is propelled by social media fitness personalities and sellers on messaging platforms, based on new investigations.
Retatrutide, which remains in clinical trials, is being promoted by online personalities for its supposed fat-burning properties. Followers are encouraged to contact these profiles directly for source information, while also receiving promotional offers.
Separately, a flourishing market exists on messaging services, where communities with thousands of members share “before and after” photos, administration instructions and claims of next-day British shipping. Sellers promote the drug there before directing customers to WhatsApp for transactions.
Retatrutide is an investigational injectable created by US drugmaker Eli Lilly. The drug targets three intestinal hormones – GLP-1, glucose-dependent insulinotropic polypeptide and pancreatic hormone. Preliminary studies indicate it could assist patients lose up to 25% of their body weight. Nicknamed the “triple G”, the substance is being hailed digitally as the next Ozempic.
However, physicians and pharmacists have warned that the sale of what is still an unapproved drug in the UK is a cause for concern and could result in users administering substances of uncertain source.
Several professionals stated the demand for retatrutide could be linked to the rising cost of licensed slimming products such as Mounjaro.
Marketing retatrutide on social media or Telegram is prohibited in the UK, as it is an unlicensed drug that must not be marketed or supplied for human use under the Human Medicines Regulations 2012.
Several influencers attempt to sidestep the rules by calling to the substance as a “research chemical” or citing it as “not for human consumption”. The substance is not a restricted drug, but advertising and supply can still violate pharmaceutical, marketing, and consumer laws, risking penalties, legal action or imprisonment.
Based on TikTok, the platform has taken down violative material and prohibited related hashtags and query recommendations. The organization stated it was committed to maintaining the service secure and allocating resources in strengthening compliance measures.
Research also discovered groups with up to nine thousand participants marketing retatrutide using the platform's integrated discovery tool, which functions like a public directory. Entering “retatrutide” instantly brings up groups with numerous of users, populated with images of weight loss, glowing reviews and step-by-step guides for mixing or administering at home.
Within minutes of joining one group, a vendor shared contact information, where most transactions take place. The seller provided an instruction manual and promised delivery within two days. When questioned whether the substance was genuine, one seller responded: “You can’t be sure.” Another shared a image of a alleged testing documentation. None asked about body mass, health issues or previous experience.
Inside these groups, messages show dark colored packages with Royal Mail stickers, stating to contain new batches. One communication read: “It took eight of us to load them this morning.”
Buyers can choose between powder vials, mixed at home with sterile water, or ready-to-use pens typically priced at £160 for 20 milligrams. When questioned how much time a injector should last, vendors give contradictory responses ranging from a several days to “depends on your body”.
A representative for Telegram said it actively monitored dangerous content on its service including content that promoted the “misuse of controlled medications”. The company added that it eliminated “millions of pieces of harmful content each day”.
“People are administering materials they can’t verify. Even if the research behind this drug is valid, these online versions may not contain what they advertise,” stated Jason Murphy, the head of pharmaceutical services at a pharmacy service.
Dr Crystal Wyllie of Asda Online Doctor connected the surge in interest to recent price rises for approved slimming medications such as Mounjaro. “With costs increasing, individuals are turning to online platforms. But counterfeit treatments are highly dangerous. You can’t be certain what’s contained or whether the environment they were produced in was sterile,” she explained.
Her team has previously encountered patients harmed by self-injection from unverified sources. “We understand the frustration, but purchasing from Telegram or communication platforms is gambling with your health,” said the doctor. “These substances could be contaminated or improperly measured.”
A spokesperson from Eli Lilly stated retatrutide was in phase 3 research studies and had not been evaluated or approved by any government authority globally. “Therefore at this point no one can market [it] for personal consumption,” they said, noting that any item “falsely representing itself as a Lilly experimental substance not yet authorized … may subject users to potentially significant medical dangers”.
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