Secrets Of Your Supermarket Food Season 3: Episode Guide & Ratings

Sian Williams and Stefan Gates take a closer look at the food that is grown, reared and produced in Britain, and the fragility of the country's food chain. Kicking things off, the Hexts from Somerset are set a daunting challenge of only buying produced here in Britain, which proves to be a difficult task. Later, Stefan investigates how consumers can save money by supporting British pig farmer, and Sian asks whether British food and drink producers can compete against their international rivals.

Sian Williams, Stefan Gates and Nisha Katona investigate how the food we eat can affect our wellbeing. Stefan visits the London Sleep Centre to explore how what we eat and drink can drastically affect the quality of our sleep, and undertakes an experiment to see how excessive amounts of caffeine, alcohol and takeaways alter his sleep patterns. Meanwhile, Sian takes a look at changes to portion sizes over the past three decades, and Nisha meets dietitian Hannah Whittaker to discuss superfoods.

Sian Williams, Stefan Gates and Nisha Katona reveal the truth about the fruit and vegetables bought in British supermarkets. With the help of dietitian Aisling Pigott, Sian discovers what actually counts as one of the recommended five a day, while Stefan goes behind the scenes of one of the largest soft fruit farms in the UK. Later, Nisha heads to Lancashire to discovers how mushrooms are grown and harvested.

A look at snacks, treats and comfort food, with Sian Williams and the Hill family examining the difference between branded biscuits and their cheaper supermarket counterparts. Stefan Gates investigates how junk food affects the human gut's microbiome, while Nisha Katona heads to Leeds to find out how chocolate is made and discovers some surprising health benefits to the dark variety.