DL-Leucyl-DL-valine is primarily used in biochemical research and peptide synthesis. It serves as a building block for creating more complex peptides and proteins, aiding in the study of their structure and function. This compound is also utilized in the development of nutritional supplements and pharmaceuticals, particularly those aimed at enhancing muscle recovery and growth. Additionally, it finds application in the formulation of cosmetic products, where it helps improve skin hydration and elasticity. Its role in these diverse fields highlights its importance in both scientific and industrial contexts.