Health messages design is a field and subset of health communication area. What is actually followed in this thesis is a review of TV health messages appeals effects from audiences’ point of view. The Important question of research is that how media products and its health related programs through various appeals lead in behavior changes.

In this study, health messages refer to direct or indirect messages which discuss people’s personal and social health. Since health message design is a subset of the broad area of health communication definition of health communication is mentioned at first. Then the main topic of this research has been mentioned. After discussing health message related literature, related communication theories are mentioned and finally the theoretical framework of research is defined as “The Extended Parallel Process Model”.

To measure Tehran’s above15-years old inhabitants’ attitudes toward health messages and TV health related programs, the survey method of research has been chosen and after designing questionnaire, and   distributing among inhabitants of Tehran. The most important result of this research is that TV health messages are not adequate to make behavior changes in personals, and interpersonal communication has a complementary and powerful role in adopting recommended TV health messages.