From a thermodynamic point of view, we must admit that clay cannot be the sole source of energy of the phenomena it produces. Raymond Dextreit, Our Earth Our Cures. Where there is a deficiency, clay seems to supply the needed substance regardless of whether or not the clay itself is rich in that substance. Clay does not merely remedy a deficiency. It goes further and stimulated the deficient organ and helps the restoration of the failing function. Our Earth Our Cures.