Adolescents are considered at high risk for engaging in such negative health behaviors as drug and alcohol use, unprotected sexual intercourse, and violence. Conventional wisdom has long upheld the belief that the peer group exerts the strongest influence on adolescent behavior. However, recent research has shown that in fact the family remains a strong factor in moderating teen risk behavior. Holistic nursing acknowledges the crucial relationship between environment and health; the environment is composed of everything that surrounds the individual, which by definition includes the family. The purpose of this article is to examine the evidence supporting the concept of the family as a protective external asset in adolescent development, to explore the way the family helps defend young people from risk, and to review briefly the implications for nursing research, practice, advocacy, and education.