This special episode examines the innovations that are making meat healthier for us and better for the planet, from muscle-bound cattle to sustainable alternatives to beef

Jimmy, Kate and Matt present some favourite investigations. Jimmy joins the fight to protect bell peppers. Are Brazil nuts radioactive? And can Matt turn the public on to goat meat?

Jimmy Doherty, Kate Quilton and Matt Tebbutt return with a new episode, uncovering more unusual, intriguing and surprising secrets behind the food we eat. Kate looks into coloured crisps. In Chile she finds out how these rainbow snacks get their colour, and discovers why the common white potato is king of the crop, despite the other fantastic options on offer. Meanwhile, Jimmy investigates one of the trendiest items on our shelves: avocados. But the rapidly rising demand for these fantastic fruits has led to alarming reports of a crime wave hitting growers. A trip to an avocado farm in Spain reveals the extent of the problem, and also sheds light on the secret to making a lovely green guacamole. And in Belgium Matt finds out about one of the tangiest tipples on our supermarket shelves: sour beer.

Can high-tech surveillance save our salmon? How on earth can you barbecue a kangaroo? Plus: the secrets behind the annual race to get seasonal asparagus into supermarkets.

In this Food Unwrapped diet special, Jimmy Doherty, Kate Quilton, Matt Tebbutt and guest presenter Kiran Jethwa cross the globe to unearth the very latest dietary trends and scientific advances in the world of weight loss. In Los Angeles, home of the body beautiful, Kate investigates reports that caffeine could be a powerful secret weapon in the battle of the bulge. Could a double espresso really help us burn extra calories, even after we finish exercising? Kate meets one of California's leading sports scientists to find out. Jimmy visits Belgium on the trail of the dieter's holy grail: a chocolate that could be good for you. The secret? It's a probiotic chocolate bar, packed with bacteria that are supposed to keep us healthy and even help us stay slim. But how does probiotic chocolate stack up against other gut-friendly foods such as sauerkraut or yoghurt?

Could a scientist's genetically engineered goats' milk save 500,000 lives a year? Is the fish we're buying really what we think it is? And what exactly is spreadable butter?

How much prawn's in a prawn cracker? What's in low-salt food instead of salt? Plus the new high-tech method of keeping fresh herbs alive for longer

Bergamot gives Jimmy's Earl Grey tea flavour, but what exactly is it? How does instant tea match up against tea bags? Plus Kate visits a jelly bean factory. And pork scratchings.

Jimmy Doherty, Kate Quilton and Matt Tebbutt return for a new series, travelling the globe to uncover more unusual, intriguing and surprising secrets behind the food we eat. Jimmy investigates shock reports that changing sea temperatures mean squid and chips could one day replace fish and chips as our national dish. To see what could be in store, he visits Thailand, where squid is a national obsession. He joins the Thai squid fishing fleet to witness a colourful display of night fishing that's so spectacular it can be seen from space. Meanwhile, millions of us take multivitamins every day. Kate investigates where they actually come from, and how much we need them. At Nasa, an astronaut lets her into the secrets of space nutrition. And what gives clotted cream its distinctive yellow colour? To find out, Matt visits the UK's leading producer in Cornwall, and an astonishing algae farm in the desert in Israel.