N-Acetyl-S-benzyl-DL-cysteine is primarily used in biochemical research as a protective agent for thiol groups in peptides and proteins. It helps prevent oxidation during synthesis or purification processes, ensuring the stability of sensitive compounds. This chemical is also employed in the study of enzyme mechanisms, particularly those involving cysteine residues, due to its ability to mimic natural substrates. Additionally, it serves as a precursor in the synthesis of more complex molecules for pharmaceutical applications, including drug development targeting oxidative stress-related conditions. Its role in modulating cellular redox balance makes it valuable in investigating pathways related to detoxification and antioxidant defense systems.