Homocysteine and Alzheimer's disease The Lancet Neurology 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, Homocysteine is an inflammatory amino acid that is produced as a byproduct of protein metabolism. Homocysteine induced injury to the arterial wall is one of the factors that can initiate the process of Protein purification and accessories pH Scientific Homocysteine Low Homocysteine? Not Good. Dr Lynch : Dr Lynch