Folic Acid, Homocysteine & Methylation The Facts Fitting homocysteine to disease models, as well as adjusting the models to the disease Journal of Molecular Medicine Springer Nature Link 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 Homocysteine and methionine are key amino acids with a vital connection to glutathione one of your body's most important substances! Methionine is abundant in many foods, so protein isn't the culprit,