All About Amino Acids

Methionine
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Why methionine is good for you

Methionine is a sulfur containing essential amino acid which assists in the breakdown of fats and so prevents the build-up of fat in the arteries. Methionine also assists with the health of the digestive system and removes heavy metals from the body. Since methionine can be converted to cysteine (which is a precursor to glutathione), it is a prime detoxifier of the liver.

 

Important methionine facts

 

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Groups at risk of methionine deficiency

People in these groups at risk of methionine deficiency should talk to a medical professional about methionine supplements BEFORE taking them.

 

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Symptoms of methionine deficiency

Symptoms of deficiency include:

Severe deficiency of methionine can cause dementia-like symptoms.

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Methionine and health

Talk to a medical professional about methionine supplements BEFORE taking them

 

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Methionine in food

FOOD AMOUNT
Methionine
(mg)
Tuna, canned in oil
1 can (171g)
1474
Snapper, cooked
1 fillet (170g)
1322
Halibut, cooked
1/2 fillet (159g)
1256
Chicken breast meat only, roasted
1 cup (140g)
1203
King mackerel
1/2 fillet (154g)
1186
Round beef, 0% fat, cooked
100g
941
Pink salmon, cooked
1/2 fillet (124g)
939
Yellow fin tuna, cooked
100g
887
Alaskan king crab
1 leg (172g)
886
Blue fin tuna, cooked
100g
885
Lean shoulder lamb, cooked
100g
875
Turkey, light meat only, roasted
100g
874
Turkey, breast only, roasted
100g
871
Lean veal leg, cooked
100g
857
Romano cheese
100g
852
Lean pork loin chops, cooked
100g
825
Gruyere cheese
100g
822
Goat cheese, hard
100g
813

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Methionine recommended daily intake (RDI)

RDA 49mg/kg body weight (infants)
32mg/kg body weight (children)
13mg/kg body weight (adult)
 
TOLERABLE UPPER LIMIT 200-800mg
 
TOXIC LEVELS No information available

 

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Methionine works best with

 

Overdosage, toxicity and cautions for methionine

There are no known drug or nutrient interactions associated with methionine.

Avoid taking more than the recommended amount of methionine, particularly if the diet is low in folic acid, vitamin B6, or vitamin B12, as conversion of methionine to homocysteine could be promoted. (Homocysteine is a potentially harmful blood fat that has been linked to atherosclerosis - hardening of the arteries).

CAUTIONS

People with a serious illness, are breastfeeding or pregnant should only take methionine under the care of a health care professional

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references

 

Last reviewed: 11 January 2007 || Last updated: 26 September 2007

 

NOTE: Mega doses of vitamins, minerals or other nutrients cannot cure illnesses and in fact can be very dangerous and produce toxic side effects and interfere with medicine you are taking. Always ensure you consult your doctor before taking any type of amino acid supplement.
Disclaimer: This guide is not intended to be used for diagnostic or prescriptive purposes. For any treatment or diagnosis of illness, please see your doctor.

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