Prolylleucine is utilized in the field of peptide research and drug development due to its role as a dipeptide. It serves as a building block in the synthesis of more complex peptides, which are often investigated for their potential therapeutic properties. In biochemical studies, it is used to understand peptide interactions, stability, and folding mechanisms. Additionally, Prolylleucine is studied for its potential applications in enhancing nutrient absorption and supporting muscle recovery, making it relevant in sports science and nutrition research. Its incorporation into peptide-based drugs is also explored for targeting specific biological pathways or treating metabolic disorders.