Food Unwrapped: Season 0, Episode 32

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A selection of favourite investigations, including Jimmy Doherty heading to southern Italy to find out where the flavour comes from in his Earl Grey tea. Kate Quilton wants to know if it is true that oysters can be eaten all year round, or whether they should be avoided in the summer months, while Matt Tebbutt is in Cornwall to learn what gives clotted cream its distinctive yellow colour.