Michael Mosley: Secrets of Your Big Shop

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.

A couple from Birmingham who suffer from digestive problems claim to have a healthy diet. But when a disguised Dr Michael ambushes them at the checkout, their trolley tells another story, and he starts them on a gut-busting food revamp. Plus, Michael Mosley tests out the viral TikTok craze for the egg diet, and delivers health hacks for pizza and spaghetti bolognaise.

Michael goes undercover as a takeaway delivery man to help a couple from Milton Keynes who would love to lose weight and find the reason for their low moods, anxiety and bad skin. He also investigates the health benefits of beetroot, takes a look at the UK's most popular breakfasts, and puts viral TikToks under the microscope, including the carrot tan and batch salads.

A couple in their forties planning their wedding want to protect their heart health, but since they already cook all their meals from scratch and shun processed food, so they're not sure where the problem begins. Plus, Michael also checks out viral TikTok claims about so-called skinny girl shots and the sinus cleansing garlic trick, and investigates high-street lunch offering.