A Guardian investigation reveals multiple UK sellers promote illegal weight‑loss drugs, notably retatrutide, leveraging high Trustpilot scores to look credible.

The MHRA reiterates its priority on public safety and its commitment to robust enforcement against illegal activities involving medicines and medical devices.

Experts from the University of Bath and KwikChex warn regulatory gaps and the overreliance on reviews to legitimize risky, unregulated markets, urging proactive investigations and enforcement.

TikTok hosts promotional content for retatrutide and similar drugs, with platforms banning related hashtags and removing violating material.

Alluvi Health Care, implicated in a recent MHRA and police raid for unlicensed products, still shows a 3.5 Trustpilot rating amid AI-generated positive summaries.

Purchasing retatrutide illegally carries risks including incorrect ingredients, improper dosing, infection, dangerous blood sugar changes, pancreatitis, and cardiovascular issues.

Trustpilot has blocked the highlighted businesses following the Guardian investigation and says it is continuing efforts to protect platform integrity.

Retatrutide UK markets itself as an unlicensed, illegal drug; the product is an experimental Eli Lilly compound targeting GLP-1, GIP, and glucagon, not approved for weight loss.

Other sellers show high ratings (4.6–4.7) while some have disengaged or posted closing notices, signaling fragile credibility.