...Essential Amino Acid Mix is a powdered, balanced mixture of essential amino acids, including cystine and histidine, for use as a supplemental protein source. Essential Amino Acid Mix is specially formulated for individuals over the age of 1 year as a protein source who need essential amino acids rather than whole protein, peptides, or a complete mixture of amino acids in the dietary management of: Conditions in which a nutritionally complete formula is not...