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Watch Michael Mosley: Secrets of Your Big Shop Season 1 Episode 1 online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

In this first episode, he meets a lorry driver on medication to control his blood pressure and cholesterol and his wife Rebecca, who works in the NHS and can't shake, or explain, her constant fatigue. Michael goes undercover at the checkout, to discover what they're buying, before overhauling the couple's diet.