Methionine is an essential amino acid—one of the building blocks of proteins and peptides that your body cannot manufacture from other chemicals. The body uses methionine to manufacture
One preliminary study suggests that methionine can prevent bacteria from sticking to urinary tract cells,
Depending on your body weight, you need between 800 and 1,000 mg of methionine daily for normal health. Deficiency is unlikely because enough methionine is generally available from the diet.
Meat, fish, dairy products, and other high-protein foods are good sources of methionine.
A proper therapeutic dosage of methionine has not been determined. One study relating to urinary tract infections used a dosage of 500 mg 3 times daily. A study enrolling people with HIV used a dose of 800 mg three times daily.
Because it seems to discourage bacteria from sticking to the wall of the bladder, methionine has been suggested as a treatment for recurrent
One study on rats suggests that methionine might protect the liver against the damaging effects of acetaminophen poisoning.
Methionine is thought to be generally safe. However, the maximum safe dosages for young children, pregnant or nursing women, or those with serious liver or kidney disease have not been established.
Like other amino acids, methionine may interfere with the absorption or action of the drug levodopa, which is used for Parkinson's disease
Last reviewed April 2009 by EBSCO CAM Review Board
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