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Methionine is an essential amino acid found in meat, fish, and dairy products. Amino acids are the building blocks used to make proteins.
Methionine cannot be made by the body, so it must be consumed in the diet. It plays an important role in the many functions within the body. It may also act as an antioxidant and help to protect damaged tissues.
People use methionine for preventing birth defects. It is also used for liver disorders, viral infections, breast cancer, and many other conditions, but there is no good scientific evidence to support these uses.
- Neural tube birth defects. High dietary intake of methionine during pregnancy seems to reduce the risk of neural tube birth defects.
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- Acetaminophen poisoning. It is unclear if oral methionine is beneficial in patients with acute acetaminophen poisoning.
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- Asthma. Login for details
- Breast cancer. It is unclear if high dietary intake of methionine reduces the risk of breast cancer.
Login for details - Cisplatin-associated ototoxicity. It is unclear if oral D-methionine prevents cisplatin-associated ototoxicity.
Login for details - Colorectal cancer. It is unclear if high dietary intake of methionine reduces the risk of colorectal cancer.
Login for details - Genital herpes. Oral L-methionine has only been evaluated in combination with other ingredients; its effects when used alone is unclear.
Login for details - Herpes zoster (shingles). Oral L-methionine has only been evaluated in combination with other ingredients; its effects when used alone is unclear.
Login for details - Human papillomavirus (HPV). It is unclear if oral methionine is beneficial for the treatment of HPV lesions or for reducing the incidence of relapse.
Login for details - Menopausal symptoms. It is unclear if oral L-methionine is beneficial for reducing hot flashes.
Login for details - Pancreatitis. Oral methionine has only been evaluated in combination with other ingredients; its effects when used alone is unclear.
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- Urinary tract infections (UTI). Oral methionine has only been evaluated in combination with other ingredients; its effects when used alone is unclear.
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When taken by mouth: Methionine is commonly consumed in foods. It is possibly safe when used as medicine under the supervision of a healthcare provider. But methionine is possibly unsafe when used for self-medication. Too much methionine can cause brain damage and death. Methionine can increase blood levels of homocysteine, a chemical that may cause heart disease, and might also promote the growth of some tumors.
Special Precautions & Warnings:
Pregnancy and breast-feeding: Methionine is commonly consumed in foods. There isn't enough reliable information to know if methionine is safe to use in larger amounts as medicine when pregnant or breast-feeding. Stay on the safe side and stick to food amounts.Children: Methionine is commonly consumed in foods. There isn't enough reliable information to know if methionine is safe to use in larger amounts as medicine without the care of a healthcare provider.
Acidosis: Methionine can cause changes in acidity of the blood and should not be used in people with a condition called acidosis.
"Hardening of the arteries" (atherosclerosis): People who have atherosclerosis should not take methionine. Methionine might make atherosclerosis worse.
Liver disease, including cirrhosis: People who have liver disease should not take methionine. Methionine might make liver disease worse.
Methylenetetrahydrofolate reductase (MTHFR) deficiency: People who have this disorder should not take methionine. Methionine might make this disorder worse.
Schizophrenia: Large doses of methionine might cause confusion, agitation, and other similar symptoms in people with schizophrenia.
It is not known if Methionine interacts with any medicines. Before taking Methionine, talk with your healthcare professional if you take any medications.
There are no known interactions with herbs and supplements.
There are no known interactions with foods.
Methionine is an essential amino acid found in meat, fish, and dairy products. It's recommended that adults consume 13 mg/kg in the diet daily. Recommended amounts for children depend on age.
As medicine, there isn't enough reliable information to know what an appropriate dose of methionine might be. Speak with a healthcare provider before using.
D-Methionine, DL-Methionine, DL Methionine, DL-Méthionine, L-2-amino-4-(methylthio)butyric acid, L-Methionine, L-Méthionine, Méthionine, Metionina.
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