The seasonal changes in concentrations of calcium (Ca), magnesium (Mg), sodium (Na) and potassium (K) present in the milk of the three main milk-producing species (cow, ewe and goat) were studied for 1 year by using flame atomic absorption spectrophotometry. The mean concentrations obtained for the four minerals studied, Ca, Mg, Na and K, were: 1.20±0.11, 0.105±0.007, 0.58±0.07 and 1.68±0.07 mg/g of fresh weight respectively for cow milk; 2.06±0.27, 0.194±0.040, 0.51±0.12 and 1.57±0.20 mg/g of fresh weight for ewe milk, 1.55±0.12, 0.142±0.014, 0.44±0.08 and 1.63±0.08 mg/g of fresh weight for goat milk. Two-factor variance analyses were made on the milk products investigated for the four mineral elements and Scheffémultiple analyses (P<0.05) were also carried out for the formation of homogeneous groups per species for the mineral elements analysed.