Jimmy Doherty, Matt Tebbutt and Kate Quilton answer more viewers' questions.
Jimmy heads to Brazil to put stock cubes in the spotlight. How can something so small taste so beefy?
Matt uncovers the clever ingredient in ice cream.
Kate travels to Swaziland to explore tinned grapefruit production, discovering that acid is used in the process, and finding out how it can be safe.
Aired: 9 Dec 2013