Definition: A naturally occurring hydrated sodium aluminum silicate, Na2O·Al2O3·(SiO2)x·(H2O)x, used for softening of hard water by exchanging its Na+ for the Ca2+ of the water; thus zeolite is an ion exchanger. Some synthetic ion exchangers are termed synthetic zeolites, although no chemical relationship exists.
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Examples: glitazone, GI cocktail, etc.