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The present research aimed to test the efficacy of affective and instrumental text messages compared with a no‐message control as a strategy to increase fruit and vegetable intake (FVI) in adolescents.

A randomized controlled trial was used test impact of different text messages compared with no message on FVI over a 2‐week period.

A total of 1,065 adolescents (14–19 years) from a high school of the South of Italy completed the baseline questionnaire and were randomly allocated to one of three conditions: instrumental messages (N = 238), affective messages (N = 300), and no messages (N = 521). Students in the message conditions received one message each day over a 2‐week period. The messages targeted affective (affective benefits) or instrumental (instrumental benefits) information about FVI. Self‐reported FVI at 2 weeks was the key dependent variable. Analyses were …