Nutrition labels with reference-point information at the nutrient level, such as a traffic-light system, are best for consumers to evaluate whether a food is healthy, according to a study in the journal Appetite. Researchers from the Netherlands studied different types of labeling and found that the traffic-light system met key goals of communicating the healthfulness of a food across product lines, among options in the same food category and when the product was evaluated alone or compared with other products.

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