(HealthDay News) -- Eating meals together as a family can reduce a teen girl's risk of turning to alcohol or drugs, a new study suggests.

In families who ate at least five meals a week together, the teen girls were much less likely to drink alcohol, or smoke marijuana or cigarettes five years later, said study author Marla Eisenberg, an assistant professor of pediatrics at the University of Minnesota Medical School.

The same effect wasn't seen for boys in this study, although Eisenberg can't say why.