S-Benzyl-L-cysteinol is primarily utilized in the field of peptide synthesis, where it serves as a crucial building block for constructing complex peptide chains. Its unique structure allows it to act as a protective group for thiol functionalities during the synthesis process, ensuring that the thiol group remains intact until the final deprotection step. This makes it particularly valuable in the production of cysteine-containing peptides, which are essential in various biological and pharmaceutical applications. Additionally, it is employed in the development of enzyme inhibitors and other bioactive molecules, where precise control over thiol reactivity is required. Its role in facilitating the synthesis of structurally diverse and functionally significant peptides underscores its importance in medicinal chemistry and drug discovery.