Impaired Homocysteine Metabolism and Atherothrombotic Disease Laboratory Investigation Homocysteine is an amino acid. Vitamins B12, B6 and folate break down homocysteine to create other chemicals your body needs. High homocysteine levels may mean you have a vitamin deficiency. With a l Cysteine Glutathione Mixed Disulfide, a Novel Bioavailable Sulfhydryl Modified Glutathione Precursor, Protects against Early Liver Injury Induced by Short Term Hypercholesterolemia Chemical Research in Toxicology Homocysitaconate controls inflammation through reshaping methionine metabolism and N homocysteinylation: Cell Metabolism