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Today, in China, tanghulu is no longer revered for its supposed medicinal benefits — it’s a festive food commonly enjoyed to usher in good luck around the new year and Lunar New Year.

He said he was unaware of any bogus claims of medicinal value for sea lion body parts, as is sometimes noted for rhino horns or donkey skins.

It is illegal to sell medicinal products containing Melanotan II in the UK but as the tanners are sold cosmetically they fall outside that remit.

The top goods exported from the UK to the US include cars, medicinal and pharmaceutical products and mechanical power generators.

As medicinal MDMA’s future in America looks uncertain, are there any lessons to be learned from Australia?