The Invisible Ingredient - a podcast by BBC World Service

We’re killing time on The Food Chain this week.

From crops that grow in just eight weeks, to whole meals that can sit on the shelf at room temperature for three years, at every stage of our food chain it seems, humans are battling against the clock, in the name of convenience, money or science.Emily Thomas asks what we lose in our attempt to eliminate this invisible ingredient.

(Picture: Hand holding invisible object, Credit: Getty Images)

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