Precision feeding of amino acids to dairy cows requires a concentrated, consistent, and balanced source of metabolizable lysine and metabolizable methionine. For optimum yield of milk volume, milk components, and profitability, NRC guidelines suggest supplying lysine at 6.6% - 7.2% of metabolizable protein and methionine at 2.2% - 2.4% of metabolizable protein. ProvAAl satisfies these recommendations for amino acid supplementation by providing high concentrations of both lysine and methionine in the proper balance.