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Methionine Brand names, Methionine Analogs

Methionine Brand Names Mixture

  • No information avaliable

Methionine Chemical_Formula


Methionine RX_link

No information avaliable

Methionine fda sheet

Methionine msds (material safety sheet)

Methionine Synthesis Reference

No information avaliable

Methionine Molecular Weight

149.207 g/mol

Methionine Melting Point

276-279 oC

Methionine H2O Solubility

No information avaliable

Methionine State


Methionine LogP


Methionine Dosage Forms

Capsules, powder and tablets

Methionine Indication

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

Methionine Pharmacology

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.

Methionine Absorption

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

Methionine side effects and Toxicity

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.

Methionine Patient Information

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.

Methionine Organisms Affected

Humans and other mammals