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General description	Semi-essential amino acid very important in allergies.
Found	- beans - brewer yeas - dairy products - eggs - seafood, fish - legumes - meat - nuts - soy - whey and whole grains
Anti-aging role	- produce histamine - chelate trace minerals and copper - benefit to patients with rheumatoid arthritis - enhance immune system function
Deficiency symptoms	4 - 5 g /day
Maximum safe level	Not established
Side effects	Large doses of histidine can cause premature ejaculation, reduce zinc level, trigger for allergy reaction or asthmatic reaction
Contraindications	- kidney or liver disease
Other remarks	- body can produce adequate amounts of histidine but in periods of rapid growth the body can not suply enough to meet demended

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