Disclosed herein is a mixed amino acid metal salt 1:1 complex of lysine and glutamic acid associated with metal ions selected from the group consisting of iron, manganese, copper and zinc to provide highly bioavailable sources of the iron, manganese, copper and zinc and as well to take advantage of the different amino acid transport pathways of lysine and glutamic acid. Also disclosed is the use of the mixed amino acid metal salt complex in nutritional supplement compositions for animals.
