Blue food – yes or euw?

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Roula Khalaf, Editor of the FT, selects her favourite stories in this weekly newsletter.

A group of diners is eating steak in a dimly lit room. Halfway through the meal, the lighting is raised and the diners are shocked to discover the meat on their plates is in fact blue. Almost all are violently sick. It’s unclear whether this oft-cited experiment from the 1970s actually took place, or is an urban myth. But the account nonetheless rings true because it…