It's a viral-sensation oat smoothie that costs pennies to make and promises to help you lose 40lb in two months. Now our experts put so-called OAT-zempic to the test...

Unless you've been living on a desert island, you will have heard of Ozempic, the weight-loss drug hailed as the holy grail for those with type 2 diabetes and now obesity. But have you heard of the latest trend?

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