Histidine

Some important facts about Histidine:
Histidine is an essential amino acid during infancy, and its synthetic pathways in older children and adults are not well understood. According to studies the clinical signs of a lack of the enzyme, which acts in the metabolism of histadine can include, impaired speech, growth retardation or mental retardation. However, whether these findings are actually related to lack of histidine is unclear since children who are deficient in histidine can be completely normal.
Too much histidine will actually cause constipation, and this is overcome by taking zinc and GLA in the form of primrose, borage, or black current oil. Men and women having difficulties achieving orgasms may be helped by histidine supplementation, as this may result in increased histamine levels in the sexual tract, which in turn may make orgasms and ejaculations easier.

Histidine functions, uses, and health benefits:
Histidine is one of the 20 most common natural amino acids present in proteins. In the nutritional sense, in humans, histidine is considered an essential amino acid, but mostly only in children. The imidazole side chains and the relatively neutral pKa of histidine mean that relatively small shifts in cellular pH will change its charge. For this reason, this amino acid side chain finds its way into considerable use as a co-ordinating ligand in metalloproteins, and also as a catalytic site in certain enzymes. The imidazole side chain has two nitrogens with different properties: One is bound to hydrogen and donates its lone pair to the aromatic ring and as such is slighty acidic, whereas the other one donates only one electron to the ring so it has a free lone pair and is basic. These properties are exploited in different ways in proteins.

1. In catalytic triads, the basic nitrogen of histidine is used to abstract a proton from serine, threonine or cysteine to activate it as a nucleophile.
In a histidine proton shuttle, histidine is used to quickly shuttle protons, it can do this by abstracting a proton with its basic nitrogen to make a positively-charged intermediate and then use another molecule, a buffer, to extract the proton from its acidic nitrogen.

2. In carbonic anhydrases, a histidine proton shuttle is utilized to rapidly shuttle protons away from a zinc-bound water molecule to quickly regenerate the active form of the enzyme. Histidine - the ejaculation-control amino acid .

3. The importance of the amino acid histidine lies in the fact that the body uses it to manufacture histamine, and histamine is responsible for a wide range of physiological processes. It is common knowledge that histamines cause the swelling and reddening in many inflammations and allergic reactions. Doctors therefore often prescribe antihistamines in the treatment of inflammations and infections, as well as allergies.

4. Less known is the important role, histamines play in sexual functions. By and large it is histamines that regulate ejaculations and orgasms. Men suffering from premature ejaculations often show increased histamine activity. They may be helped by an amino acid which counteracts the formation of histamine from histidine, or the activity of histamine, namely methionine.

5. Contrarily, men and women having difficulties achieving orgasms may be helped by histidine supplementation, as this may result in increased histamine levels in the sexual tract, which in turn may make orgasms and ejaculations easier. Older men who experience a slow down in sexual response may also ask their doctors about histidine supplementation.

6. An additional pro-sexual effect of histidine may lay in its vasodilating effect, thus making blood flow to the sex organs easier. " Apart from its sexual functions, histidine is involved in many other physiological processes. It is necessary for the production of red and white blood cells and supports the activity of suppressor T cells.

7. Histidine is used as a supplement for sufferers of rheumatoid arthritis, since it has been shown that in these patients, histidine levels are low. And last not least, histidine is, like many other amino acids, important for growth and general tissue repair.

Dietary sources of histidine:
Histidine can be obtained in a variety of foods, including beans, brewer's yeast, brown rice bran, caseinate, dairy products, eggs, fish, lactalbumin, legumes, meat, nuts, seafood, seeds, soy, whey, whole grains. Dairy, meat and poultry, and fish are good sources of histidine.

Histidine dosage, intake:
Most people do not need to supplement histidine. Most studies of histidine have used between 1 and 8 grams per day. Histidine deficiency According to limited research, many people with rheumatoid arthritis have low levels of histidine.

Histidine deficiency:
Histidine deficiency in babies causes eczema. Histidine deficiency can result in cataracts (diets that exclude Histidine result in Cataracts within three weeks). Histidine deficiency is suspected to be associated with stomach and duodenal ulcer.

Deficiency symptoms:
Any important deficiency symptom is not 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.

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 physician.

Daily requirement:
The daily dosage requirement is recommended as 8-10 mg per day per kilogram of body weight.