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Types of Amino Acids
Alanine
Arginine
Aspartic Acid
Citrulline
Cysteine
Cystine
Glutamic Acid
Glutamine
Glycine
Histidine
Isoleucine
Leucine
Lysine
Methionine
Ornithine
Phenylalanine
Proline
Serine
Threonine
Tyrosine
Valine

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Dec 14,2017
Histidine H (His)
Chemical Properties: Basic (Basic group)
Physical Properties: Polar (positively charged)

Histidine, an essential amino acid, has as a positively charged imidazole functional group.

The imidazole makes it a common participant in enzyme catalyzed reactions. The unprotonated imidazole is nucleophilic and can serve as a general base, while the protonated form can serve as a general acid. The residue can also serve a role in stabilizing the folded structures of proteins.

Histidine amino acid information page
Histidine is an essential amino acid, manufactured in sufficient quantities in adults, but children may at some time have a shortage of this important vitamin. It is one of the basic (reference to pH factor) amino acids due to its aromatic nitrogen-heterocyclic imidazole side chain. This amino acid is metabolized into the neurotransmitter histamine and the set of genes that produce the enzymes responsible for histidine synthesis.

Histidine is required for
Histidine is also a precursor of histamine, a compound released by immune system cells during an allergic reaction.

It is needed for growth and for the repair of tissue, as well as the maintenance of the myelin sheaths that act as protector for nerve cells.

It is further required for the manufacture of both red and white blood cells, and helps to protect the body from damage caused by radiation and in removing heavy metals from the body.

In the stomach, histidine is also helpful in producing gastric juices, and people with a shortage of gastric juices or suffering from indigestion, may also benefit from this nutrient.

Deficiency of histidine
None known, but it is reported that an increase in the intake of this nutrient helps with the lengthening of orgasms and also more intense sexual enjoyment.

Dosage
The dosage listed is the Recommended Daily Allowance (RDA), but be aware that this dosage is the minimum that you require per day, to ward off serious deficiency of this particular nutrient. In the therapeutic use of this nutrient, the dosage is usually increased considerably, but the toxicity level must be kept in mind.

Some people take 1,000 mg of histidine two to three times per day in capsule or tablet form but it is best to work out the dosage requirements as 8-10 mg per day per kilogram of body weight.

Toxicity and symptoms of high intake
There are no reported side effects with histidine, but too high levels of histidine may lead to stress and mental disorders such as anxiety and people with schizophrenia have been found to have high levels of histidine.

People suffering from schizophrenia or bipolar (manic) depression should not take a histidine supplement without the approval of their medical professional.

Best used with
Best taken with vitamin B3 (niacin) and B6 (pyridoxine).

When more may be required
Although not conclusively proven - it is thought that histidine may be beneficial to people suffering from arthritis and nerve deafness.

Other interesting points
Histidine is also used for sexual arousal, functioning and enjoyment

Histidinemia is an inborn error of the metabolism of histidine due to a deficiency of the enzyme histidase, where high levels of histidine are found in the blood and urine, and may manifest in speech disorders and mental retardation.

Food sources of histidine
Dairy, meat, poultry and fish are good sources of histidine as well as rice, wheat and rye.
  • Functioning as a precursor to histamine
  • Sexual arousal and orgasmic function
  • Rheumatoid Arthritis
  • Precursor to Carnosine and Anserine
  • Gastric acid secretions to aid digestion
  • Circadian rhythms
  • Neuronal health and function
  • Production of red and white blood cells


Low Price Amino Acids Vitamins & Nutrition
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