Currently, it has been understudied which forms of feed supplements ensure the most positive effect onincreasing milk nutritional value and processing properties. In this regard, an experiment was conducted in comparable groups of 90 cows. The animals of the 1st (control) group were fed compound feed concentrate that included the following ingredients: a rumen-protected fatsupplementMegalac (3.1%); a buffering agent -sodium bicarbonate (1.4%); protein digestion stimulator Farmatan TM (0.57%); mineral and vitamin premixRindavit 51 ATG RV (3.6%); the animals of the 2nd (trial) group were giventhe following feed supplements: protected fat Nutracor (3.0%); a buffer-ing agent Rumenbuffer (0.9%); protein-mineral-vitamin concentrate Cowfit 5 Plus (3.75%); mineral and vitamin premix Cowfit Immuno Fertil(0.75%). In the 2nd (trial) group, the levels of milk components increased as follow-ing: lactose -by 20%; butterfat -by 15%; casein -by 25%; calcium -by 33%; phosphorus -by 53%; copper by 45%, zinc -by 89%; vitamin A -by 67%; vitamin E -by 30%; that was indicative of milk nutritional value increase