How would “traffic light” labels affect food choices? Positively, according to a two-year study involving more than 5 000 people.

A US hospital tracked the food choices of more than 5 000 of their employees, by tracking their cafeteria purchases.

Healthy foods were given a green label, less healthy a yellow label, and the least healthy a red label.

The results showed that over the two year span, there were significantly more “green label”purchases, and “red label” purchases dropped.

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