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- By Hailey Hughes
- 03 Sep 2026
A shadow market for unapproved weight-loss drugs is propelled by social media fitness personalities and vendors on messaging platforms, based on new investigations.
The experimental drug, which is still in research studies, is being advertised by online personalities for its alleged fat-burning properties. Followers are encouraged to contact these accounts privately for source information, while also obtaining promotional offers.
Additionally, a flourishing market exists on messaging services, where groups with numerous of members share “before and after” photos, injection guides and claims of rapid British shipping. Vendors promote the drug there before directing customers to WhatsApp for purchases.
This medication is an experimental injection developed by American pharmaceutical company Eli Lilly. The treatment targets three gut hormones – glucagon-like peptide-1, glucose-dependent insulinotropic polypeptide and glucagon. Early trials suggest it could assist individuals reduce up to a quarter of their total weight. Nicknamed the “triple G”, the drug is being promoted online as the successor to Ozempic.
However, physicians and chemists have warned that the distribution of what remains an unlicensed drug in the United Kingdom is a cause for concern and could lead to individuals administering substances of unknown origin.
Some experts said the demand for the experimental drug could be connected to the increasing cost of licensed weight loss treatments such as Mounjaro.
Selling retatrutide on social media or Telegram is illegal in the UK, as it is an unapproved medication that must not be promoted or supplied for personal consumption under the British medical regulations.
Some influencers try to sidestep the regulations by calling to the substance as a “research chemical” or citing it as “not for human consumption”. The substance is not a controlled substance, but advertising and distribution can still breach medicines, marketing, and consumer laws, potentially leading to penalties, prosecution or imprisonment.
Based on TikTok, the platform has removed violative content and prohibited related hashtags and query recommendations. The organization stated it was dedicated to keeping the platform secure and allocating resources in strengthening compliance measures.
Research also discovered communities with up to 9,000 members marketing retatrutide using the platform's built-in search feature, which operates like a public directory. Entering “retatrutide” immediately brings up groups with thousands of users, filled with images of weight loss, positive reviews and detailed guides for preparing or injecting at home.
After moments of entering one group, a seller posted WhatsApp details, where the majority of transactions take place. The vendor provided an guidebook and promised delivery within 48 hours. When asked whether the product was genuine, one seller responded: “You can’t be sure.” Another provided a photo of a alleged laboratory certificate. Not one inquired about weight, medical conditions or previous experience.
Within these groups, posts show dark colored parcels with postal service stickers, stating to contain fresh supplies. 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 ready-to-use injectors usually priced at £160 for 20mg. When questioned how much time a injector should be used, vendors give contradictory answers ranging from a few weeks to “depends on your body”.
A spokesperson for the messaging service stated it regularly moderated dangerous content on its service including material that encouraged the “misuse of controlled medications”. The organization noted that it eliminated “millions of pieces of harmful content each day”.
“People are injecting substances they cannot confirm. Although the research behind this drug is sound, these digital versions may not include what they claim,” stated a pharmacy expert, the director of pharmaceutical services at a pharmacy service.
A medical professional of an online medical service linked the surge in demand to current price rises for authorized weight-loss medications such as Mounjaro. “With costs increasing, individuals are turning to online platforms. But fake treatments are highly dangerous. You cannot know what’s contained or whether the conditions they were produced in was clean,” she said.
Her staff has previously seen patients harmed by self-injection from unverified suppliers. “We understand the frustration, but buying from messaging apps or WhatsApp is taking chances with your health,” said Wyllie. “These materials could be contaminated or incorrectly dosed.”
A representative from Eli Lilly stated retatrutide was in third stage clinical trials and had not been evaluated or authorized by any government authority globally. “Consequently at this time no one can sell [it] for human use,” they said, adding that any item “falsely representing itself as a Lilly experimental substance not yet authorized … may subject users to possibly significant health risks”.
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