GIRI, due to its international structure, organizes workshops yearly throughout the world. It convenes systematically in congresses during each of the International Encounters of Monaco. The aim of the GIRI is to bring together pharmacologists, biologists, physicians, chemists and physicists to communicate, exchange experiences and develop joint research projects; the distinctive feature of the research activities of the group is the study of ultra low dose substances or very high dilutions, homopathics included. Although the mechanism of action of the very diluted solutions of active principles on biological systems is an important concern of the GIRI, the major interest of the Group is directed towards the possible medicinal and therapeutic relevance of the very low doses. More than one hundred persons are GIRI members, coming from 20 different countries.