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A shadow market for unlicensed slimming medications is being driven by TikTok fitness influencers and vendors on messaging platforms, according to new investigations.

Investigational Drug Gaining Popularity Via Social Media

Retatrutide, which remains in clinical trials, is being promoted by online personalities for its alleged fat-burning effects. Followers are encouraged to contact these profiles privately for supplier links, while also obtaining discount codes.

Thriving Commerce on Messaging Platforms

Additionally, a robust trade exists on messaging services, where groups with numerous of members share comparison photos, injection guides and claims of rapid UK delivery. Vendors promote the substance there before redirecting buyers to other platforms for purchases.

Learning About Retatrutide

This medication is an investigational injectable created by American pharmaceutical company Eli Lilly. The treatment affects three intestinal hormones – GLP-1, glucose-dependent insulinotropic polypeptide and pancreatic hormone. Preliminary studies suggest it could help individuals reduce up to 25% of their total weight. Nicknamed the “triple G”, the substance is being promoted online as the successor to Ozempic.

Medical Professionals Express Concerns

However, doctors and pharmacists have warned that the sale of what remains an unlicensed medication in the UK is a cause for concern and could result in individuals injecting substances of unknown origin.

Several experts stated the demand for the experimental drug could be linked to the increasing price of approved weight loss treatments such as Mounjaro.

Legal Position and Implementation

Marketing the unapproved drug on social media or messaging apps is prohibited in the UK, as it is an unlicensed medication that cannot be promoted or supplied for personal consumption under the Human Medicines Regulations 2012.

Some content creators attempt to sidestep the regulations by calling to the substance as a “research chemical” or describing it as “not for human consumption”. The substance is not a restricted drug, but promotion and distribution can still violate medicines, marketing, and consumer laws, potentially leading to penalties, legal action or imprisonment.

Service Response and Material Removal

Based on TikTok, the service has removed problematic material and banned related keywords and search suggestions. The company stated it was committed to keeping the service secure and investing in strengthening enforcement strategies.

Online Marketplace Activities

Investigations also found communities with up to 9,000 participants marketing the experimental drug using the platform's integrated discovery tool, which operates like a public directory. Typing “retatrutide” instantly brings up groups with thousands of users, filled with images of weight loss, glowing reviews and detailed instructions for mixing or administering at residence.

Within moments of entering one community, a vendor posted contact information, where the majority of purchases take place. The vendor sent an instruction manual and guaranteed shipping within 48 hours. When asked whether the product was authentic, one vendor responded: “You can’t be sure.” Another shared a image of a alleged testing documentation. Not one asked about weight, medical conditions or past usage.

Product Details and Pricing

Within these groups, posts show dark colored packages with postal service stickers, claiming to include fresh supplies. One communication stated: “It took eight of us to load them this morning.”

Buyers can choose between dry substance containers, prepared at home with purified liquid, or pre-filled pens typically priced at £160 for 20 milligrams. When asked how long a injector should last, sellers give conflicting responses ranging from a few weeks to “depends on your body”.

Service Oversight and Safety Measures

A spokesperson for the messaging service said it actively moderated harmful 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”.

Healthcare Professional Warnings

“People are administering materials they can’t verify. Although the science behind this drug is sound, these online products may not contain what they advertise,” said a pharmacy expert, the director of pharmaceutical services at Chemist4U.

A medical professional of Asda Online Doctor connected the increase in demand to recent cost increases for approved weight-loss medications such as Mounjaro. “With costs rising, patients are turning to online platforms. But fake treatments are highly dangerous. You cannot know what’s inside or whether the conditions they were produced in was sterile,” she explained.

Her staff has previously seen individuals harmed by self-injection from unverified sources. “We recognize the disappointment, but buying from messaging apps or WhatsApp is taking chances with your health,” stated the doctor. “These materials could be contaminated or incorrectly dosed.”

Manufacturer Position

A representative from Eli Lilly said retatrutide was in phase 3 research studies and had not been evaluated or approved by any regulatory agency anywhere in the world. “Therefore at this point no one can market [it] for human use,” they said, noting that any product “falsely representing itself as a company experimental substance not yet authorized … may subject patients to potentially serious health risks”.