DL-Homocystine is primarily used in biochemical research to study metabolic pathways, particularly those involving sulfur-containing amino acids. It serves as a key compound in investigating homocystinuria, a genetic disorder characterized by the abnormal metabolism of methionine. Researchers utilize DL-Homocystine to understand the biochemical mechanisms underlying this condition and to develop potential therapeutic interventions. Additionally, it is employed in studies related to cardiovascular health, as elevated levels of homocysteine, a derivative, are linked to an increased risk of heart disease. In laboratory settings, DL-Homocystine is also used as a standard or reference material in analytical techniques such as chromatography and mass spectrometry to quantify homocysteine and related metabolites in biological samples.