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Illegal melatonin sales exposed in UK online marketplaces despite strict regulations

Hidden in teas, patches, and high-dose tablets, unapproved melatonin floods the UK market. Experts warn of dangerous side effects from unchecked use.

The image shows a yellow pill with the number 90 on it against a white background.
The image shows a yellow pill with the number 90 on it against a white background.

Illegal melatonin sales exposed in UK online marketplaces despite strict regulations

An investigation by Which? has uncovered illegal sales of melatonin across several online marketplaces. The hormone, used to treat sleep disorders, is only available in the UK with a prescription. Yet sellers have been bypassing regulations by disguising products or offering them without proper labelling.

Melatonin is a naturally occurring hormone that helps regulate sleep, particularly for those over 55 with short-term insomnia. In the UK, it is classified as a medicine, meaning it requires a doctor's prescription. However, Which? discovered the substance being advertised openly on various platforms, breaking the law.

The investigation found melatonin in forms such as high-dose tablets, skin patches, and teas. Some products contained up to 30mg—15 times the standard starting dose in the UK. Sellers often mislabelled items to avoid detection, making it harder for platforms to identify and remove them.

Sue Davies, Head of Consumer Policy at Which?, raised concerns about the risks involved. Without proper oversight, buyers face potential health dangers from unknown ingredients or incorrect dosages.

The illegal sale of melatonin online continues despite strict UK regulations. Consumers risk purchasing unregulated products with potentially harmful effects. Which? has called for stronger enforcement to prevent further violations.

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