This longitudinal study investigates the relationship between social media usage and mental health outcomes among adolescents. Utilizing a sample of participants aged 13 to 18, data was collected over a two-year period through surveys and psychological assessments. Results indicate a complex interplay between different aspects of social media usage and various dimensions of mental health, including depression, anxiety, and self-esteem. Findings suggest that while certain patterns of social media engagement may contribute to adverse mental health outcomes, others may offer potential benefits. Implications for interventions and future research directions are discussed.