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a-amino-g-methylthiol-n-butyric acid
Methionine is an essential amino acid. You need to get it through food. You need it to make protein and other compounds in your body.
There may be benefits that have not yet been proven through research.
Methionine is an antioxidant. It may help protect the body from damage caused by ionizing radiation. It may detoxify harmful substances in the body, such as heavy metals. It may also prevent liver damage from acetaminophen poisoning. And it may help prevent fat deposits in your liver.
It may also help ease fatigue and reduce the risk of early balding. It may also help treat osteoporosis.
Amino acids (AAs) can be taken as single AAs or in AA combinations. They also come as part of multi-vitamins, proteins, and food supplements. The forms include tablets, fluids, and powders.
If you eat enough protein in your diet, you get all of the amino acids you need.
There are no conditions that increase how much methionine you need.
Using a single amino acid supplement may lead to negative nitrogen balance. This can lessen how well your metabolism works. It can also make your kidneys work harder. In children, taking single amino acid supplements may also cause growth problems.
You should not take high doses of single amino acids for long periods of time.
Methionine can cause:
Nausea
Vomiting
Dizziness
Drowsiness
Low blood pressure
Irritability
It may also make liver problems worse. Talk to your healthcare provider before using it if you have severe liver disease.
People with bipolar disorder should not take methionine supplements.
Women who are pregnant or breastfeeding shouldn’t use methionine supplements.
Toxicity of methionine is rare. It only happens if you take too much of it.
People with homocystinuria type I, an inherited disease, shouldn’t use methionine supplements.
If you take methionine supplements without enough folic acid, vitamin B6, and vitamin B12, it can increase the conversion of methionine to homocysteine. This may increase your risk for heart disease.