Groups of adolescents from the Danish National Birth Cohort (DNBC) will be offered to participate in the health educational programs. At 14 years and 14 years plus 3 months all children DNBC are invited to report comprehensively on their dietary and physical activity habits by means of a web-based questionnaire (FFQ). Eligible DNBC adolescents for the SMS-educational program will be invited among those who have completed the FFQ. Thus, once they have completed the DNBC FFQ, they may be invited to participate in the SMS-based educational programs, either addressing only one of the three target factors: sugar sweetened beverages, fruit & vegetables, or fish (SSB, F&V, or Fish) or addressing all three factors (cluster). The adolescents may also potentially be invited to include a friend, their mother or both.