The ambition of personalized medicine now also concerns the prevention of chronic diseases, based on genetic risk profiles. The objective of this project was to describe the perception and attitudes of patients and general practitioners (GP) on this issue, in order to consider the consequences on the health system. The study included two axes, patients (questionnaire survey) and GPs (consensus study using the Delphi method), preceded by a qualitative exploratory phase. The study showed that genetic screening for disease risk factors was not a priority, either for patients or for GPs. On the other hand, the role of the GP in the use of these tests will probably be predominant. This implies the need for training and availability of up-to-date information.