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, Hyperhomocysteinemia: Underlying Links to Stroke and Hydrocephalus, with a Focus on Polyphenol Based Therapeutic Approaches Impaired Homocysteine Metabolism and Atherothrombotic Disease Laboratory Investigation The Controversial Role of Homocysteine in Neurology: From Labs to Clinical Practice