Evaluation of the National Academies of Sciences, Engineering, and Medicine (NASEM) milk protein yield prediction model with data from Brazilian commercial farms

= 0.74), but the lowest accuracy (RMSE = 224.7 g/d, 14.7% of the mean). The number of protein sources in the diets was greater in the high and medium productions clusters compared with the low production cluster (4.1, 3.9, and 3.0 sources, respectively; SEM = 0.33). Increasing the production level of the cluster linearly increased the EAA use efficiency of all EAA. The greater pull effect in the higher production groups and the better combination of AA from more protein sources could explain better AA efficiencies.