Abstract: A method is described for preparing a product adapted for stimulation and enhancement of processes of reduction, transformation and metabolization of polluting substances that are present in soils and/or waters, the method comprising the following steps: a first step comprising: preparing a totally natural mineral substance based on Magnesium Potassium Sulphate, “activating” said mineral substance by mixing it for a time of 3? 23?, with a tolerance of plus-minus 10 seconds; a second step comprising: making an organic-base product obtained by burying bovine manure inserted in cow horns into weakly calcareous soil (pH 7.5-8.