A number of inorganic ion exchangers were evaluated for their ability to remove Cs and Sr from milk. The synthetic exchangers titanium phosphate, zirconium phosphosilicate and sodium titanate or combinations of these removed up to 95% of the Cs and 54% of the Sr. Disadvantages of the use of these compounds were their high cost and the large pH change of the milk caused by the treatment. Natural zeolitic samples with high clinoptilolite content removed more than 90% of the Cs and 25% of the Sr without changing the pH. The composition of the treated milk was within the ranges normally found for milk from different sources. A trained tasting panel found the treated milk to be suitable for human consumption.