This systematic review and meta-analysis examine the health and psychosocial consequences of bullying victimization in children and adolescents. The study analyzed 165 eligible studies published up to February 2015, finding statistically significant associations between bullying victimization and a wide range of adverse health and psychosocial problems. The strongest evidence supports a causal relationship between bullying victimization and mental health issues such as depression, anxiety, poor general health, and suicidal ideation and behaviors. Probable causal associations were found between bullying victimization and tobacco and illicit drug use. The study also found associations between bullying victimization and other adverse health and psychosocial problems, though causality could not be conclusively determined for all. Bullying victimization was associated with increased risk of substance use, including alcohol and illicit drugs. The study found that bullying victimization was linked to increased risk of somatic symptoms, overweight and obesity, and poor academic achievement. There was also an association between bullying victimization and social problems, such as loneliness and poor life satisfaction. However, the study found no consistent association between bullying victimization and low self-esteem, social problems, or criminal behavior. The study used a quality effects model to assess the strength of the associations, finding a dose-response relationship between the severity of bullying and adverse outcomes, particularly for mental health problems. The study concluded that there is convincing evidence of a causal relationship between bullying victimization and adverse health outcomes, including anxiety, depression, poor mental health, poor general health, non-suicidal self-injury, suicidal ideation, and suicide attempts. It is also probable that bullying victimization increases the risk of cigarette smoking and illicit drug use. The study highlights the need for effective interventions in schools to address bullying behaviors and their negative impacts.This systematic review and meta-analysis examine the health and psychosocial consequences of bullying victimization in children and adolescents. The study analyzed 165 eligible studies published up to February 2015, finding statistically significant associations between bullying victimization and a wide range of adverse health and psychosocial problems. The strongest evidence supports a causal relationship between bullying victimization and mental health issues such as depression, anxiety, poor general health, and suicidal ideation and behaviors. Probable causal associations were found between bullying victimization and tobacco and illicit drug use. The study also found associations between bullying victimization and other adverse health and psychosocial problems, though causality could not be conclusively determined for all. Bullying victimization was associated with increased risk of substance use, including alcohol and illicit drugs. The study found that bullying victimization was linked to increased risk of somatic symptoms, overweight and obesity, and poor academic achievement. There was also an association between bullying victimization and social problems, such as loneliness and poor life satisfaction. However, the study found no consistent association between bullying victimization and low self-esteem, social problems, or criminal behavior. The study used a quality effects model to assess the strength of the associations, finding a dose-response relationship between the severity of bullying and adverse outcomes, particularly for mental health problems. The study concluded that there is convincing evidence of a causal relationship between bullying victimization and adverse health outcomes, including anxiety, depression, poor mental health, poor general health, non-suicidal self-injury, suicidal ideation, and suicide attempts. It is also probable that bullying victimization increases the risk of cigarette smoking and illicit drug use. The study highlights the need for effective interventions in schools to address bullying behaviors and their negative impacts.