The purpose of this paper is to explore health literacy of adults in the United States and review health outcomes as well as provider implications. Limited health literacy is a serious problem in the United States. Approximately 80 million adults in the United States have limited health literacy, which can adversely affect the quality of their health care. Poor health outcomes are associated with being health illiterate. Evidence shows that limited health literacy is associated with more hospitalizations; greater use of emergency care; lower receipt of mammography screening and influenza vaccine; poorer ability to demonstrate taking medications properly; poorer ability to interpret drug labels and health messages; and, among elderly persons...