Epigenetics studies the nature and influence of mechanisms on gene expression. It seeks to understand how a gene is used by a cell or not. The main goals of epigenetics are to enable healthcare practitioners, through next-generation DNA testing, to individualize their recommendations for health, diet and lifestyle. Thus, preventive medicine, diagnostics and therapy can be optimized. Génie Santé is an association whose vocation is to promote, through training activities, epigenetics in France. As such, it is a partner of Nordic Genex Oy, based in Finland, who is a pioneering supplier of DNA tests for nutritional and health purposes.