Critical health literacy: reflection and action for health.

Health literacy research is growing rapidly and broadly; however, conceptual advances in critical health literacy (CHL) seem hampered by a lack of a clear definition. In this paper, we refer to key features of the concept as identified in earlier works, offer a new definition of CHL and briefly discuss its theoretical roots. Reflection and action are suggested as the two constituent components of CHL. Consequences for future research are also discussed.