The purpose of this study was to investigate people’s knowledge about the negative health effects associated with doping, and people’s attitudes towards doping in general. Two groups of people were studied, competitive athletes that compete in organized sports and regular exercisers who just train for a good health. Regarding the negative health effects of doping, the study mostly consists of the use of anabolic steroids since they have the most serious negative health effects. I chose a quantitative study and made a questionnaire survey. Questions were asked about the respondent’s attitudes towards doping and what negative health effects they thought doping could cause. The result of the survey shows that most of the people, but not everyone, were clearly opposed to the use of doping. They thought it was cheating and they knew it was harmful to people’s health. The respondents also knew of several negative health effects that can occur from doping use. My conclusion of the study is that a clear majority, of both competing athletes and regular exercisers, are against doping in all its forms, and that they are aware that doping is harmful to people’s health, and what some of these negative  health effects can be.