Glu-Glu, a dipeptide composed of two glutamic acid molecules, is primarily used in biochemical research and pharmaceutical applications. It serves as a substrate in enzymatic studies to investigate the activity of proteases and peptidases, helping researchers understand enzyme kinetics and specificity. In the pharmaceutical industry, Glu-Glu is utilized in the development of peptide-based drugs, particularly those targeting metabolic disorders or neurological conditions, due to its role in neurotransmitter regulation. Additionally, it is employed in the production of nutritional supplements aimed at enhancing cognitive function or supporting gut health, as glutamic acid is a precursor to the neurotransmitter glutamate. Its stability and solubility make it a valuable component in various experimental and therapeutic formulations.