In today's milk production and overall agricultural production, the aim is to reduce the use of antibiotics, pesticides, hormonal preparations as a significant step towards more sustainable production, and later the transition to an environmentally friendly method of production. This experiment was set up in direction to examine the benefits of using zeolite in the direction of improving the health of cows, by reducing the number of somatic cells as the main indicator of udder health, and consequently reduce the incidence of mastitis. The experiment was performed on 60 dairy cows divided into three groups according to the number of lactations. The first group, consisted of cows in the 1st lactation, the second group consisted of cows in the 2nd and 3rd lactations, and the third group consisted of cows in the 4th and higher lactations, at the beginning of the experiment the average lactation day of all cows was 160. The duration of the experiment was 42 days and three milk controls were performed (0., 21st and 42nd day), also on the same days’ urine tests were performed. No significant difference according to statistical data processing regarding the number of somatic cells in milk was recorded, although nominally there was a decrease in the number of somatic cells according to the days in the experiment, a significant difference in the number of somatic cells was found between cows of the first group to cows of the second and third groups. Furthermore, a significant difference was found in the percentage of milk fat, which increased according to the days in the experiment. No significant difference was found for other milk parameters, except for concentration of urea for which oscillations were recorded between control periods. According to the analysis of urine, a significant reduction in the amount of excreted protein was found. Also, the incidence of mastitis among cows in the experiment was reduced and it can be concluded that although no statistically significant reduction in the number of somatic cells was recorded, in practice the premise of this experiment was successfully confirmed. It can be confirmed that zeolites as additives in the feeding of cows have immune stimulating, antibacterial and antioxidant effects on udder health, and ultimately on the general health of cows.