Adolescents' ability to select healthy food using two different front-of-pack food labels: a cross-over study.

Objective: To compare, in adolescents, two models of front-of-pack Guideline Daily Amounts (GDA) labels in terms of (i) friendliness and acceptance and (ii) the ability to choose a diet that closely follows the nutritional recommendations.

Design: A randomized cross-over study was designed to compare two simplified front-of-pack GDA nutrition labels.

Setting: A Spanish secondary school.