氨基酸螯合鐵（Amino acid chelated iron）的生物價(jià)值

一般的微量元素?zé)o機(jī)鹽及簡(jiǎn)單的有機(jī)鹽在被動(dòng)物攝入后，必須借助于輔酶的作用，與氨基酸或其他物質(zhì)形成螯(絡(luò))合物后，才能被機(jī)體吸收，吸收后微量元素在血液中與某些蛋白質(zhì)結(jié)合被運(yùn)輸?shù)綑C(jī)體所需部位，才發(fā)生功效。因此，微量元素氨基酸螯合物符合動(dòng)物原始吸收模式，它既是機(jī)體吸收金屬離子的主要形式，又是動(dòng)物體內(nèi)合成蛋白質(zhì)過程中的中間物質(zhì)，所以氨基酸微量元素螯合物不僅吸收快，而且可以節(jié)省許多生化過程，節(jié)約體能消耗，使其具有較高的生物學(xué)效價(jià)。氨基酸螯合鐵的相對(duì)生物效價(jià)測(cè)定采用公認(rèn)的斜率比方法，以硫酸亞鐵為參比標(biāo)準(zhǔn)物用四種鐵營養(yǎng)敏感指標(biāo)(血紅蛋白、血清鐵、血清鐵蛋白和血清總鐵結(jié)合力)，測(cè)得賴氨酸螯合鐵和甘氨酸螯合鐵的相對(duì)生物學(xué)效價(jià)分別介于102%~148%和103%~147%之間。螯合鐵在吸收、轉(zhuǎn)運(yùn)和利用方面都優(yōu)于無機(jī)鹽鐵，與在鐵元素和氨基酸等價(jià)的混合物相比較，螯合鐵也顯示出明顯的營養(yǎng)優(yōu)勢(shì)。體外酶學(xué)實(shí)驗(yàn)觀測(cè)到甘氨酸螯合鐵對(duì)血紅素合成酶體系中σ-氨基γ-酮戊酸合成酶反饋抑制作用明顯，有利于血紅素的大量合成。這是從機(jī)理闡明氨基酸鐵補(bǔ)鐵效果極佳的最好佐證。

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賴氨酸甘氨酸鎂Magnesium Lysinate Glycinate、甘氨酸谷氨酰胺鎂Magnesium Glycinate Glutamine、檸檬酸蘋果酸鎂Magnesium Citrate Malate、檸檬酸鍶Strontium Citrate、檸檬酸錳Manganese Citrate、檸檬酸銅Copper Citrate、天門冬氨酸鋰Lithium Aspartate、牛磺酸硒Selenium Taurate、抗壞血酸錳Manganese Ascorbate、抗壞血酸亞鐵Ferrous Ascorbate

The biological value of Amino acid chelated iron

General trace element inorganic salt and simple organic salt after being ingested by animals, must rely on the action of coenzymes, and amino acids or other substances to form a chelate (complex) complex, in order to be absorbed by the body, after absorption of trace elements in the blood and some proteins are combined to transport to the body's required parts, before the effect occurs. Therefore, the trace element amino acid chelate conforms to the original absorption mode of animals, which is not only the main form of metal ions absorbed by the body, but also the intermediate substance in the process of protein synthesis in the animal body, so the amino acid trace element chelate is not only absorbed quickly, but also can save many biochemical processes, save energy consumption, so that it has a high biological titer. The relative biotiter of amino acid chelated iron was determined by the accepted slope ratio method, with ferrous sulfate as the reference standard and four iron nutrient sensitivity indexes (hemoglobin, serum iron, serum ferritin and serum total iron binding capacity). The relative biological titers of iron lysine chelate and iron glycine chelate were 102%-148% and 103%-147%, respectively. Chelated iron is superior to inorganic iron in terms of absorption, transport and utilization. Compared with the mixture of iron and amino acid equivalent, chelated iron also shows obvious nutritional advantages. In vitro enzymatic experiments have observed that iron glycine chelate has obvious feedback inhibition on σ-aminogamma-ketovalerate synthetase in heme synthetase system, which is conducive to the synthesis of large amounts of heme. This is the best evidence to illustrate the excellent effect of amino acid iron supplementation from the mechanism.

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Magnesium Lysinate Glycinate, Magnesium Glycinate Glutamine, Magnesium Citrate Malate, Strontium citrate Citrate, Manganese Citrate, Copper Citrate, Lithium Aspartate, Selenium Taurate, Manganese ascorbate Ferrous Ascorbate Ascorbate.