Methionine

• ATC:V03AB26
• ATC:V06DD
• Dietary supplement
• Micronutrient
• Essential Amino Acid

• (S)-2-Amino-4-(methylthio)butanoic acid
• 2-Amino-4-(methylthio)butyric acid
• Acimethin
• Butanoic acid, 2-amino-4-(methylthio)-, (S)-
• Cymethion
• L-(-)-Methionine
• L-Homocysteine, S-methyl-
• L-a-Amino-g-methylthiobutyric acid
• Methionine
• a-Amino-g-methylmercaptobutyric acid
• g-Methylthio-a-aminobutyric acid

• No information avaliable

C₅H₁₁N₁O₂S₁

No information avaliable

http://ptcl.chem.ox.ac.uk/MSDS/ME/l-methionine.html

No information avaliable

149.207 g/mol

276-279 ^oC

No information avaliable

Solid

-2.308

Capsules, powder and tablets

Used for protein synthesis including the formation of SAMe, L-homocysteine, L-cysteine, taurine, and sulfate.

Is a principle supplier of sulfur which prevents disorders of the hair, skin and nails; helps lower cholesterol levels by increasing the liver's production of lecithin; reduces liver fat and protects the kidneys; a natural chelating agent for heavy metals; regulates the formation of ammonia and creates ammonia-free urine which reduces bladder irritation; influences hair follicles and promotes hair growth. L-methionine may protect against the toxic effects of hepatotoxins, such as acetaminophen. Methionine may have antioxidant activity.

Absorbed from the lumen of the small intestine into the enterocytes by an active transport process.

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.

There are no indications for the use of supplemental methionine unless specifically recommended by a physician. It is effective as an antidote in some cases of acetaminophen poisoning. But, because some research suggests that it may promote some cancers, its use as a supplement is inadvisable.

Humans and other mammals