A bit bloated after Christmas? Got the January blues? Kick off 2018 with a health boost from Jimmy Doherty, Kate Quilton, Matt Tebbutt and Dr Helen Lawal as they share surprising tips for staying healthy, and little-known ways of getting body and mind back on the rails through food. In Hollywood, Jimmy tries the latest trend that's like something from a sci-fi movie: meal replacement drinks, apparently so packed with nutrients that they're all you'd ever need to consume. Kate investigates whether a weight-loss superpower is hidden in curry. Matt hunts for the ultimate diet snack and looks into whether low-calorie rice cakes are as nutrient-dense as other tasty alternatives. And Helen heads to Tanzania where the Hadza tribe's unique diet could reveal how to stay healthy and maybe even happy!

Christmas is coming and you're cordially invited to join Jimmy Doherty, Kate Quilton, Matt Tebbutt and Dr Helen Lawal as they reveal astonishing surprises behind our favourite festive grub, from the mystery of why Christmas puddings last so long to the perfect stuffing for your turkey. Jimmy visits north-west America to check out the latest non-meat treat for Christmas day: tofurkey, and finds himself on a wild turkey chase in a town overrun with them. Meanwhile, Matt searches for the best accompaniment to real turkey, and visits Britain's biggest manufacturer of sage and onion stuffing, before a flavour scientist in Belgium insists that the best match for turkey is chocolate, nuts and mushrooms! In Italy, Kate tracks down the makers of those festive silver ball cake decorations to find out if there's any real silver in them. And in beautiful Zanzibar Helen checks out Christmas spice cinnamon, and what difference those delicious sticks or cinnamon powder make to mulled wine.

The team investigate why some supermarket food prices have soared this year, and reveal how technology can help us save money, from dynamic pricing to innovative packaging.

In Scotland, Jimmy Doherty finds out how some whisky gets its smoky flavour. In Cyprus, Matt Tebbutt asks why halloumi cheese doesn't melt, while in France, Kate Quilton visits the world's biggest sweetcorn factory to find out how they get corn off the cob so neatly.

Jimmy Doherty heads to Portugal to learn about the battle against the hidden nuisance that leads to corked wine, while in Cyprus, Matt Tebbutt solves the riddle of why cooking okra produces tonnes of slime. Plus, Kate Quilton looks into the surprising difference between runny and set honey.

Jimmy Doherty visits Spain to investigate how much orange is in orange squash. In snowy Canada, Matt Tebbutt finds out why maple syrup is so expensive, while Kate Quilton reveals the surprising reason why so many of the UK's favourite biscuits have little holes all over them.

Jimmy finds out that shellfish consumed by millions have been feeding on plastic discarded in the sea, with shocking global implications. Kate finds out whether the makers of Marmite can really predict whether people will love or hate their distinctive yeast-based spread, as claimed in their latest TV advert, and Matt aims to solve the age-old mystery of how to smoothly extract ketchup from a bottle - by running across a pond of custard.