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- By Jay Wilson
- 03 Oct 2026
An underground economy for unapproved slimming medications is propelled by TikTok fitness influencers and sellers on communication apps, according to new investigations.
Retatrutide, which is still in clinical trials, is being promoted by online personalities for its supposed weight-reducing properties. Followers are encouraged to message these profiles directly for supplier links, while also receiving promotional offers.
Additionally, a robust trade exists on Telegram, where groups with numerous of participants share comparison photos, administration instructions and claims of rapid British shipping. Vendors promote the drug there before redirecting customers to WhatsApp for transactions.
This medication is an experimental injection developed by US drugmaker Eli Lilly. The treatment affects three gut hormones – glucagon-like peptide-1, GIP and glucagon. Early trials suggest it could assist individuals reduce up to 25% of their body weight. Nicknamed the “triple G”, the substance is being promoted online as the next Ozempic.
However, doctors and chemists have cautions that the distribution of what remains an unlicensed drug in the UK is a cause for concern and could result in individuals administering products of uncertain source.
Some professionals stated the demand for the experimental drug could be connected to the increasing price of approved weight loss products such as Mounjaro.
Marketing retatrutide on TikTok or Telegram is illegal in the United Kingdom, as it is an unlicensed drug that cannot be marketed or distributed for human use under the Human Medicines Regulations 2012.
Some content creators attempt to circumvent the rules by calling to the substance 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 consumer regulations, risking fines, prosecution or prison.
According to TikTok, the service has taken down problematic material and banned associated hashtags and query recommendations. The company said it was dedicated to keeping the service secure and allocating resources in enhancing compliance measures.
Research also found groups with up to nine thousand members selling retatrutide using Telegram's built-in search feature, which functions like a public directory. Typing “retatrutide” instantly displays channels with numerous of users, filled with photos of weight loss, glowing testimonials and detailed guides for preparing or administering at residence.
Within minutes of joining one group, a seller shared WhatsApp details, where the majority of transactions take place. The seller sent an guidebook and guaranteed delivery within two days. When asked whether the product was authentic, one seller said: “You can’t be sure.” Another shared a photo of a supposed laboratory certificate. None asked about weight, health issues or previous experience.
Inside these communities, posts show dark colored packages with postal service stickers, stating to contain fresh supplies. One message read: “It took eight of us to load them this morning.”
Buyers can choose between dry substance containers, prepared at home with sterile water, or pre-filled injectors usually priced at £160 for 20 milligrams. When asked how long a pen should last, vendors give conflicting answers ranging from a few weeks to “depends on your body”.
A spokesperson for the messaging service said it regularly monitored dangerous material on its platform including material that encouraged the “misuse of controlled medications”. The company added that it eliminated “millions of pieces of harmful content each day”.
“People are administering substances they can’t verify. Although the science behind this drug is sound, these online products may not include what they claim,” said Jason Murphy, the director of pharmacy at Chemist4U.
Dr Crystal Wyllie of an online medical service connected the increase in interest to recent price rises for approved slimming drugs such as Mounjaro. “With costs rising, patients are using online platforms. But counterfeit treatments are highly risky. You cannot know what’s inside or whether the conditions they were produced in was clean,” she said.
Her team has already seen individuals injured by self-injection from unverified suppliers. “We recognize the disappointment, but buying from Telegram or WhatsApp is gambling with your well-being,” said the doctor. “These substances could be contaminated or improperly measured.”
A spokesperson from Eli Lilly said retatrutide was in third stage clinical trials and had not been evaluated or approved by any government authority anywhere in the world. “Therefore at this time no one can market [it] for human use,” they said, adding that any item “misleadingly claiming itself as a company experimental substance not yet approved … may expose patients to possibly serious health risks”.
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