Modulation of Cystathionine Synthase Level Regulates Total Serum Homocysteine in Mice Circulation Research DL methionyl DL methionine as an efficient methionine source for promoting zootechnical performance and methionine related pathways in the whiteleg shrimp (Penaeus vannamei) British Journal of Nutrition Cambridge Core The Glutathione System: A New Drug Target in Neuroimmune Disorders Molecular Neurobiology Springer Nature Link Mechanisms and rationales of SAM homeostasis: Trends in Biochemical Sciences 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,