. "Humans and other mammals"@en . . . . "L-a-Amino-g-methylthiobutyric acid"@en . . "A sulfur containing essential amino acid that is important in many body functions. It is a chelating agent for heavy metals. [PubChem]"@en . "Doses of L-methionine of up to 250 mg daily are generally well tolerated. Higher doses may cause nausea, vomiting and headache. Healthy adults taking 8 grams of L-methionine daily for four days were found to have reduced serum folate levels and leucocytosis. Healthy adults taking 13.9 grams of L-methionine daily for five days were found to have changes in serum pH and potassium and increased urinary calcium excretion. Schizophrenic patients given 10 to 20 grams of L-methionine daily for two weeks developed functional psychoses. Single doses of 8 grams precipitated encephalopathy in patients with cirrhosis."@en . "(S)-2-amino-4-(methylthio)butanoic acid"@en . . "nutraceutical"@en . "63-68-3"@en . . . "Absorbed from the lumen of the small intestine into the enterocytes by an active transport process."@en . . . . . . . . . . . . . "Take with food."@en . . "The mechanism of the possible anti-hepatotoxic activity of L-methionine is not entirely clear. It is thought that metabolism of high doses of acetaminophen in the liver lead to decreased levels of hepatic glutathione and increased oxidative stress. L-methionine is a precursor to L-cysteine. L-cysteine itself may have antioxidant activity. L-cysteine is also a precursor to the antioxidant glutathione. Antioxidant activity of L-methionine and metabolites of L-methionine appear to account for its possible anti-hepatotoxic activity. Recent research suggests that methionine itself has free-radical scavenging activity by virtue of its sulfur, as well as its chelating ability."@en . "(2S)-2-amino-4-(Methylsulfanyl)butanoic acid"@en . . . "L-alpha-amino-gamma-Methylmercaptobutyric acid"@en . . " "@en . "M"@en . . . "L-\u03B1-amino-\u03B3-methylmercaptobutyric acid"@en . . . . . . . . . . . . . . . . "(S)-2-amino-4-(methylthio)butyric acid"@en . "Used for protein synthesis including the formation of SAMe, L-homocysteine, L-cysteine, taurine, and sulfate."@en . . "L-Methionine"@en . . "Clyde Eugene Stauffer, \"Process for producing N-acyl-L-methionine.\" U.S. Patent US3963573, issued June, 1950."@en . "L-Methionin"@en . "L-(-)-Methionine"@en . "L-Methionine"@en . "(S)-methionine"@en . "Met"@en . . . "approved"@en . "Methionine"@en . . . . . .