This article describes two models for thinking about the purposes of health education--a medical model and an education model--and traces how concerns about the validity of research have driven preference for the medical model. In the medical model, the purpose of health education is to develop effective interventions that will prevent people from adopting unhealthy behaviors. Here, health educators are expected to replicate the methods identified by researchers to effect targeted changes in health behavior. The article then describes an alternative way of thinking about the purposes of health education. In pursuing a philosophy of education, the purpose of research and practice would be to clarify basic social values and to strengthen one's faculty for making value judgments. Practitioners here use research results as a stimulus for dialogue about the role of good health habits in living the kind of life that community members find most valuable. (Contains 2 notes.)