Sunarno, Manalu W, Kusumorini N, Ratih D. Improvement of Function in the Aging Rat Hippocampus by Administration of Alanine-Glutamine Dipeptide as a Precursor of the Antioxidant Glutathione. Pak. J. Nutr. 2015;14(11):749–757. doi:10.3923/pjn.2015.749.757