All About Amino Acids

Phenylalanine
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Why phenylalanine is good for you

Phenylalanine is an essential amino acid and is used to elevate the mood, as it is so closely involved with the nervous system. Phenylalanine also helps with memory and learning.

 

Important phenylalanine facts

 

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Groups at risk of phenylalanine deficiency

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

 

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Symptoms of phenylalanine deficiency

General deficiency symptoms may include:

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Phenylalanine and health

Talk to a medical professional about phenylalanine supplements BEFORE taking them

 

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Phenylalanine in food

FOOD AMOUNT
Phenylalanine
(mg)
Roasted pumpkin seeds
1 cup
3727
Soybeans, dry roasted
100g
2066
Tuna, canned in oil
1 can (171g)
1944
Gruyere cheese
100g
1743
Chicken breast meat, roasted
1 cup (140g)
1743
Romano cheese
100g
1710
Swiss cheese
100g
1662
Halibut, cooked
1/2 fillet (159g)
1657
King mackerel, cooked
1/2 fillet (154g)
1563
Lean veal leg, cooked
100g
1481
Edam cheese
100g
1434
Lean round beef, cooked
100g
1427
Lean shoulder lamb, cooked
100g
1389
Lean veal sirloin, cooked
100g
1371
Alaskan king crab
1 leg (172g)
1329
Egg, white, dried
28g
1326
Lean veal shank, cooked
100g
1299
Soy protein isolate
28g
1286

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Phenylalanine recommended daily intake (RDI)

RDA 41mg/kg body weight (infants)
22mg/kg body weight (children)
16mg/kg body weight (adult)
 
TOLERABLE UPPER LIMIT 150-600mg
 
TOXIC LEVELS No information available

 

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Phenylalanine works best with

 

Overdosage, toxicity and cautions for phenylalanine

Toxicity is rare in dietary intake but large amounts in supplement form may play havoc with blood pressure and cause headaches, nausea and heartburn. Large amounts may cause nerve damage.

Since Phenylalanine has such major mood-altering effects, supplementation should only be taken under medical supervision.

CAUTIONS

The following groups of people should NOT take phenylalanine supplements:

Phenylalanine supplements may interact with certain antidepressants or stimulants - talk a medical professional BEFORE taking this supplement.

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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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