Vitamin C_ vitamin

Vitamin C_ vitamin

Can treat scurvy and acid, is called the ascorbic acid. The content is very high in lemon juice, green plants and tomato. It is monocline stretch brilliant or needle easy to oxidize and produce, it takes off the intersection of hydrogen and broken blood to be sour brilliant to be ascorbic and sour, take off hydrogen bad blood acid and still support one's family
Function of plain C. In alkaline solution, take off inner ring easy to hydrolyze ester of hydrogen in the broken the intersection of blood and sour molecule two the intersection of ketone and ancient Lip river sour. Ester type structure in can't be turned in animal's body intoing of this kind of compound. Produce oxalic acid or sulfic acid ester combined with sulfuric acid in the human body finally, discharge from the urine. So, two ketone ancient Lip river acid does not have physiological activity again.
Hall of Norwegian chemist Sri Lankan specially find in lemon juice, did not get the pure product until 1934 1907, but artificial synthesis. Vitamin C is the most unstable kind of vitamin, because it is easy to be oxidized, while the food preserves or cooks, even vitamin C can be destroyed while mincing the fresh vegetables. Micro- copper, iron ion can accelerate the speed that is destroyed. So have fresh vegetables, fruit or raw to it mixes dishes to be the abundant source of vitamin C only. It is the colourless crystal, melting point is 190- 192 , apt to be soluble in water, aqueous solution presents acidity, the chemical property is relatively lively, overheat, alkali and heavy metal ion are apt to decompose, so the stir-fry can not use copper pan and too heat long.
Plant and most animal can in formate vitamin C in the health since. People, primates, and guinea pig lack, change into enzyme of vitamin C L - ancient the intersection of Lip river and acid, can't synthetic vitamin C, so must absorb from the food, while lacking vitamin C in the food, scurvy will happen. Bleed because the intercellular substance turns into the obstacle at this moment, teeth become flexible, the wound is difficult to heal, exchange symptoms such as fracture,etc.. Because vitamin C longer in half-life in the human body ' About 16 days) ,Will present scurvy after so does not eat the food containing vitamin C for 3- 4 months. Because vitamin C is easy to be oxidized and reduce, so generally think its natural function should relate to this characteristic. Vitamin C and collagenic normal synthetic internal the intersection of hydroxyphenylaminopropionic acid and supersession and absorption of iron there are direct relations. The main function of vitamin C is to help the human body to finish oxidizing reduction reaction, improve the human body and sterilize ability and ability of detoxifying. Lack vitamin C and cause scurvy for a long time. Eating more fruit, vegetables can meet the human requirements for vitamin C. It is being firm and preventing the structure of brain cell from relaxing and tightening the respect and playing a quite great role that vitamin C is promoting structure of brain cell, and can prevent the thin tube of nerve that transport the nourishment stops up, attenuates, relaxes. Absorb sufficient vitamin C, can make nerve to be detailed to in charge of penetrating take a favorable turn, make brain get nutrition supplement smoothly in time, thus make the mental work take a favorable turn, intelligence is improved. Study according to the intersection of the Nobel laureate and forest Bao, take heavy dose of vitamin C play an certain role in preventing cold and anticancer. But someone proposes, there are irons ion (Fe2 +) The production that vitamin C can promote free radical, therefore think that should use a large amount of to be unsafe while existing.
The demand of every day: The adult needs to take in 50- 100mg every day. Namely half a piece of guava, 75 grams of hot peppers, the wild cabbage of 90 grams of rachises, 2 kiwi fruits, 150 grams of strawberries, the intersection of 1 shaddock, half papaya, 125 grams of fennels, 150 grams of cauliflower and 200 ml of orange juice.
Efficiency: Vitamin C can catch free radical, can prevent disease such as cancer, arteriosclerosis, rheumatism here. In addition, it still can strengthen the immunity and, are beneficial to the skin, gingivae and nerve.
Side effect: So far, vitamin C is thought to have no harm, because the kidney can excrete surplus vitamin C, the research report which U.S.A. delivers newly points out, there is a large number of vitamin C that circulates the unfavorable wound to heal in the body. Vitamin C taken in every day exceeds 1000 milligrams of sterility that will cause diarrhoea, kidney stone, will even cause genetic defect.
Take the bad reaction of vitamin C
Show according to domestic and foreign research, increase with the consumption of vitamin C day by day, bad reactions produced are more and more too.
Diarrhoea. Take 1- 4 grams of vitamin C every day, can make the small intestine wriggle and accelerate, present disease of suffering from abdominal pain, suffering from diarrhoea etc..
Gastrorrhagia. A large amount of long-term oral vitamin C, will happen disgustingly and vomiting etc.. Meanwhile, because the gastric acid is secreted and increased, can impel stomach and duodenal ulcer to pain and aggravate, the serious one can also lead to stomach mucous membrane congesting, edema, and cause gastrorrhagia.
Calculus. Behind a large amount of vitamin C enters the human body, the majority is decomposed by the liver supersession, the final product is oxalic acid, excrete, become oxalate oxalic acid from the urine; Someone discovers, take 4 grams of vitamin C orally every day, within 24 hours, the content of oxalate will be defied by 58 milligrams to increase to 620 milligrams in the urine. If continue taking, oxalate is increasing constantly, it is extremely apt to form urinary system calculus.
Gout. Gout is a kind of disease caused by getting muddled in internal purine supersession, show as blood urine sour density too high, cause joint, connective tissue with kidney a series of symptom take place mainly. And take vitamin C in a large amount, can cause the urine acid to increase severely, bring out gout.
Baby's dependence. Pregnant women take vitamin C in a large amount continuously, will make foetuses produce dependence to this medicine. After being born in, if did not take a large amount of vitamin C for babies, scurvy could happen, bleeding, subcutaneous hemorrhage such as presenting depression, gingivae red swelling; Even have symptoms such as gastrointestinal tract, secreting hemorrhage of the urethra,etc..
Children's dept. of orthopedics. Children take vitamin C in a large amount, can suffer from dept. of orthopedics, and the incidence is relatively high.
Infertility. The women of child-bearing age take vitamin C in a large amount for a long time ' When the daily dosage is greater than 2 grams) ,Will make fecundity reduce.Immunity is reduced. Take vitamin C in a large amount for a long time, can reduce engulfing the function of the leucocyte, make the body resistance against diseases drop.
Allergic response. Mainly shown as rash, disgusting, vomit, anaphylactic shock can happen when being serious, so can't abuse.


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