 Methods: This randomized controlled study consisted of 252 adolescents, of whom 120 were in the control group and 132 comprised the intervention group. Sociodemographic characteristics of adolescents, internet usage, Adolescent Lifestyle Questionnaire ALQ, e-health literacy, and information levels of the adolescents were determined before the intervention. No procedures were applied to the control group. A web-based health education and consultation program designed to promote a healthy lifestyle was applied to the intervention group. The results were re-evaluated three months after the intervention. 