Exclusive: Guardian investigation finds unlicensed jabs offered as experts call for more online regulation

Companies selling illegal weight-loss drugs are amassing positive Trustpilot reviews as critics say regulatory gaps allow high-risk operators to appear credible.

A Guardian investigation found that Retatrutide UK had a score of 4.4 on the global review site, despite purporting to offer a drug that is unlicensed and illegal to sell or buy. Its website sells a 20mg retatrutide pen for £132.