Changing the food environment in secondary school canteens to promote healthy dietary choices: a qualitative study with school caterers.

A meta-analysis of the effect of CA interventions upon fruit and vegetable behaviours [ 24 ] found that such interventions had a moderately significant effect ( d = 0.30) upon increasing fruit and/or vegetable choice and sales or servings, with the largest effect seen for altering the placement of food items ( d = 0.39) and combined strategies ( d = 0.28).

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