DL-Ethionine sulfone is primarily utilized in biochemical research to study the effects of methionine metabolism and its inhibition. It serves as a valuable tool in experiments aimed at understanding the biochemical pathways involving methionine, particularly in the context of liver function and protein synthesis. Researchers employ this compound to induce experimental models of liver damage and to investigate the mechanisms of hepatotoxicity. Additionally, it is used in studies exploring the role of methionine in cancer biology, as it can mimic methionine deficiency, which is known to affect tumor growth and cellular metabolism. Its application extends to the examination of oxidative stress and the impact of sulfone derivatives on cellular processes.