The BIONATURE bad odor absorber is the result of a recent technology involving natural biodegradable ferments which make it possible to stop sulfurous or ammoniacal bad odors in a natural way by coating them. BIONATURE absorbent is not harmful to health or the environment and is made from 100% natural ingredients. Unlike the competition, the BIONATURE absorbent does not in any way involve zinc, which is a heavy metal and harmful to the environment.