- The percentage of added milk, even if relatively low, caused changes in the composition and nutritional characteristics of the innovative products (Table 2). The composition of milk was 3.6% protein, 4.4% fat, and 4.0% lactose for CC milk; 4.0% protein, 4.6% fat, and 4.3% lactose for CE milk; and 3.5% protein, 4.1% fat, and 4.3% lactose for CG milk. After production and during ripening, the CG sample had a significantly lower fat content and higher ash content than the CC sample. The lower fat content may be associated with the different composition of the initial mixed milk and with a higher fat loss in the hot water used to stretch the curd, caused by the smaller fat globules in goat milk. The different added milks had no significant effect on cheese proteins. Lactose and galactose showed different values among samples, because of different microbial activities and, at d 60 of ripening, they were absent in all samples. In all samples, the change in color (L*, a*, b*), monitored on the surface and in the inner part of cheeses, did not show significant changes.