Disordered eating behaviors, such as unhealthy weight control practices and binge eating, are a concern for adolescent health, given their high prevalence and harmful consequences. In this 5-year longitudinal study of more than 2500 adolescents, Neumark-Sztainer and colleagues found that extreme weight control behaviors, such as using diet pills or laxatives or vomiting, were 3-fold more common among females than males. Having at least 5 family meals together per week lowered this risk by 30% among females. However, among males, regular family meals were associated with skipping meals and eating little. The reasons for these sex differences are unknown and need further investigation.