Z-Ile-Trp-OH is primarily used in peptide synthesis and research applications. It serves as a building block for creating more complex peptides, particularly in the study of peptide structure and function. Its specific sequence makes it valuable for investigating interactions within proteins and enzymes. Additionally, it is utilized in the development of bioactive peptides, which can have potential therapeutic applications, such as antimicrobial or enzyme-inhibiting properties. Researchers also employ it in studies related to peptide stability and folding, contributing to advancements in biochemistry and drug discovery.