On the front ... with a mask and internally to drain the stomach, the intestines and the colon but also, the lymph, the blood, the bones and all the organs of the body. Clay, one of the first materials on this planet, is used in modeling and architectural construction for its plastic properties. Used in the medical field and in the technical industry for its high absorption properties. Reference work, theoretical and practical to learn the external and internal modes of use of clays: Raymond Dextreit, The healing clay. Edition revised and increased by Pascal Labbé, Edition Terran, 2019.