AFM1 contents of White cheeses contaminated with 1.5 and 3.5 μg/kg of AFM1 (CHS-1.5 and CHS-3.5) produced from pasteurized milks contaminated with 1.5 and 3.5 μg/kg of AFM1 (PM-1.5 and PM-3.5) were found 3.72 and 9.81 μg/kg, respectively (Table 1). This indicated that there was an average 2.8-fold AFM1 in White cheeses over that found in raw milk from which the cheeses were made. This increase in AFM1 contents seem to be natural depending on the increase in its dry matter content. Since AFM1 is associated with casein (Wiseman & Marth, 1983), this increase during cheesemaking was expected. In fact increase or enrichment in AFM1 contents of cheeses is only relative increase depending on the increases in concentration and decreases in volume. Therefore, to determine how cheese producing stages affect the AFM1 content of milk, total AFM1 contents of samples (sample weight X AFM1 level in per kg of sample) should be used in the calculation of AFM1 loses. In this respect, AFM1 levels in per kg of samples (μg/kg) were found and then their total AFM1 contents (μg) were calculated. To emphasize AFM1 loses, total AFM1 contents of raw milks contaminated with AFM1 was considered as 100% and total AFM1 loses in products produced from these contaminated milks was showed as percentage (%) (Table 1).