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- 14 Sep 2026
An underground economy for unapproved slimming drugs is being driven by TikTok fitness influencers and sellers on communication apps, based on new investigations.
Retatrutide, which is still in clinical trials, is being advertised by online personalities for its alleged weight-reducing effects. Followers are urged to contact these profiles privately for supplier links, while also obtaining discount codes.
Additionally, a flourishing market exists on Telegram, where groups with thousands of members share comparison images, administration instructions and claims of rapid UK delivery. Vendors market the drug there before directing customers to other platforms for transactions.
Retatrutide is an experimental injectable developed by US drugmaker Eli Lilly. The drug targets three intestinal hormones â GLP-1, glucose-dependent insulinotropic polypeptide and pancreatic hormone. Early trials indicate it could assist patients reduce up to 25% of their total weight. Referred to as the âtriple Gâ, the drug is being promoted digitally as the successor to Ozempic.
However, doctors and chemists have cautions that the sale of what is still an unapproved medication in the United Kingdom is worrisome and could lead to individuals injecting products of unknown origin.
Several professionals stated the demand for retatrutide could be connected to the increasing cost of approved weight loss treatments such as Mounjaro.
Marketing retatrutide on TikTok or messaging apps is illegal in the United Kingdom, as it is an unlicensed drug that must not be marketed or distributed for personal consumption under the Human Medicines Regulations 2012.
Several influencers attempt to circumvent the regulations by calling to the substance as a âresearch chemicalâ or describing it as ânot for human consumptionâ. The substance is not a controlled substance, but promotion and distribution can still breach medicines, advertising, and consumer regulations, potentially leading to penalties, legal action or prison.
According to the social media company, the platform has removed problematic material and prohibited related hashtags and search suggestions. The company said it was committed to keeping the service secure and allocating resources in enhancing enforcement strategies.
Research also found communities with up to 9,000 members selling retatrutide using Telegram's integrated discovery tool, which operates like a online catalog. Entering âretatrutideâ immediately brings up groups with numerous of members, filled with images of weight loss, glowing testimonials and detailed instructions for preparing or administering at residence.
After minutes of entering one group, a vendor posted contact information, where most transactions take place. The vendor sent an guidebook and guaranteed shipping within two days. When questioned whether the substance was authentic, one seller responded: âYou canât be sure.â Another shared a photo of a alleged testing documentation. Not one inquired about weight, health issues or past usage.
Inside these communities, posts display black plastic parcels with Royal Mail stickers, claiming to include new batches. One message read: âIt took eight of us to load them this morning.â
Customers can choose between dry substance containers, mixed at residence with sterile water, or pre-filled pens typically priced at 160 pounds for 20mg. When questioned how much time a pen should last, sellers give contradictory answers varying between a few weeks to âdepends on your bodyâ.
A representative for Telegram stated it actively monitored dangerous material on its platform including content that encouraged the âmisuse of controlled medicationsâ. The company added that it removed âmillions of pieces of harmful content each dayâ.
âPeople are administering materials they canât verify. Although the science behind retatrutide is sound, these online products may not include what they advertise,â said a pharmacy expert, the head of pharmacy at Chemist4U.
Dr Crystal Wyllie of Asda Online Doctor connected the surge in demand to recent cost increases for approved slimming medications such as Mounjaro. âWith prices increasing, patients are using social media. But counterfeit injections are highly dangerous. You canât be certain whatâs contained or whether the conditions they were made in was clean,â she said.
Her staff has previously seen patients injured by self-injection from unverified suppliers. âWe understand the frustration, but buying from Telegram or communication platforms is gambling with your well-being,â said the doctor. âThese materials could be contaminated or incorrectly dosed.â
A spokesperson from Eli Lilly said the substance was in third stage clinical trials and had not been reviewed or authorized by any regulatory agency globally. âConsequently at this time no one can market [it] for human use,â they explained, adding that any item âfalsely representing itself as a Lilly investigational product not yet approved ⌠may subject users to possibly serious health risksâ.
A tech journalist with over a decade of experience covering digital innovations and consumer electronics.