Chelation in Nutrition, Evidence for Natural Chelates Which Aid in the Utilization of Zinc by Chicks

Scott, M. L.; Zeigler, T. R.

doi:10.1021/jf60126a006

Cited by 44 publications

(8 citation statements)

References 5 publications

(7 reference statements)

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“…17 The linear increase in the apparent absorption of Zn in the Cr-yeast-supplemented group is difficult to explain. However, some of the naturally occurring chelators, such as yeast in distillers' dried solubles, reportedly improved the absorption of Zn in chicks, 20 and this may partially help in explaining the pattern of Zn absorption in the present investigation.…”

Section: Intake and Apparent Absorption Of Cr And Some Major And Tracmentioning

confidence: 60%

Efficiency of nutrient utilization and reproductive performance of pre‐pubertal anestrous dairy heifers supplemented with inorganic and organic chromium compounds

et al. 2006

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An on-farm trial was conducted to ascertain the effects of chromium supplementation on the nutrient utilization and reproductive performance of cross-bred (Bos taurus × Bos indicus) prepubertal anestrous dairy heifers. Chromium was supplemented (0, 0.25, 0.5 and 1.0 mg kg −1 diet dry matter) as chromium chloride hexahydrate or chromium-yeast complex. The intake of the total digestible nutrients (P < 0.01) and body weight gain (P < 0.05) increased with supplementation of chromium. Chromium-yeast supplementation resulted in a dose-dependent increment (P < 0.01) in the total digestible nutrient intake. Intake and apparent absorption of chromium increased linearly (P < 0.001) with the dose. Chromium chloride tended to be better absorbed (P < 0.10) than the chromium-yeast complex. The source of supplemental chromium did not affect the plasma concentrations of glucose, cholesterol, total protein and albumin. The postprandial plasma glucose concentration in the control group increased by 38% versus 0.27 and 1.1% in the heifers supplemented with 1.0 mg Cr kg −1 dry matter as chromium chloride and chromium-yeast complex, respectively. The postprandial increment in the plasma cholesterol was also generally lower in the supplemented heifers. The plasma chromium concentration varied (P < 0.05) between the groups, although it was difficult to correlate these changes with the sources and doses of supplemental chromium. Chromium chloride and chromium-yeast supplementation resulted in similar changes in the plasma concentrations of copper, zinc, iron and manganese (P > 0.05). Plasma concentrations of copper and zinc, which increased (P < 0.001) with chromium supplementation, declined quadratically (P < 0.05) as the dose of supplemental chromium increased. At the end of the supplementation, two, four and three heifers fed with 0.25, 0.5 and 1.0 mg Cr kg −1 dry matter (as chromium chloride), respectively, developed Graffian follicles and showed estrus; the numbers were one, three and four in the corresponding groups fed with chromium-yeast complex and one, two and three heifers amongst them showed estrus. All the supplemented animals showing estrus conceived and no abortion was reported during the first trimester of their pregnancy. It was concluded that chromium supplementation could appreciably enhance the nutrient utilization and the reproductive performance in anestrous dairy heifers and inorganic trivalent chromium (CrCl 3 .6H 2 O) supplementation might be as useful as a chromium-yeast complex for this purpose.

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Section: Intake and Apparent Absorption Of Cr And Some Major And Tracmentioning

confidence: 60%

Efficiency of nutrient utilization and reproductive performance of pre‐pubertal anestrous dairy heifers supplemented with inorganic and organic chromium compounds

et al. 2006

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“…Zn-Met is shown to have higher bioavailability and resist binding with dietary fiber and phytate which usually inhibit zinc absorption. Chelation with proteins or amino acids is found to enhance zinc absorption as postulated by Scott and Zeigler in 1963 [42]. Later research demonstrated a strong potentiating effect of a zinc histidine complex on zinc uptake by the rat ileum [50].…”

Section: Zinc Methionine Bioavailability Studymentioning

confidence: 88%

Bioavailability, antioxidant and immune‐enhancing properties of zinc methionine

Chien¹,

Zafra-Stone²,

Bagchi³

et al. 2006

BioFactors

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Although a large number of transition metals and cations remarkably induce oxidative deterioration of biological macromolecules including lipids, proteins and DNA, the trace element zinc acts as a novel dietary supplement and an essential micronutrient, and serves a wide range of biological functions in human and animal health. Zinc promotes antioxidant and immune functions, stabilizes and maintains the structural integrity of biological membranes, and plays a pivotal role in skin and connective tissue metabolism and repair. Zinc is an integral constituent of a large number of enzymes including antioxidant enzymes, and hormones including glucagon, insulin, growth hormone, and sex hormones. High concentrations of zinc are found in the prostate gland and choroids of the eye. Zinc deficiency leads to biochemical abnormalities including the impairments of growth, dermal, gastrointestinal, neurologic and immunologic systems. Given its superior bioavailability, antioxidant and immune-enhancing properties, zinc methionine may serve as a novel dietary supplement to promote health benefits in humans and animals.

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“…Davis et al (1962) found that the addition of EDTA to diets containing isolated soybean protein increased the availability of zinc, manganese and copper. Scott and Zeigler (1963) have reported results which indicate that sev-eral natural feedstuffs contain a factor or factors which improve absorption and utilization of zinc. It appeared that the active principle may be a chelate since EDTA had the same effect.…”

Section: Discussionmentioning

confidence: 99%

Effect of Replacing Part of the Soybean Meal in Turkey Poult Rations With Amino Acid and Carbohydrate Mixtures

Anderson

Warnick

1970

Poultry Science

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T HIS paper reports results of experiments conducted to determine if poult performance could be improved by altering the amino acid balance in a ration based on corn, soybean meal and methionine or in a ration based on corn, soybean meal, herring meal and methionine.Experiments also are being conducted at our station to determine how the essential amino acids should be proportioned to make a well balanced turkey poult ration. The results of tests along this line through the 1968 season were presented at the 1968 meeting of the Poultry Science Association. A more complete publication of these results is not planned until more experiments are conducted. Major modification of the proportions listed in the abstract (Warnick and Anderson, 1968b) is not expected, and the values reported in the abstract were used as a guide in formulating rations 2 and 5 fed in the work reported in this paper. The proportions found by Dobson et al. (1964) to be well balanced for the chick are so similar that they could have been used as a guide in formulating the two rations. The rations were fed partly to determine if the proportions listed in the abstract can be used as a guide in formulating practical turkey rations.

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Chelation in Nutrition, Evidence for Natural Chelates Which Aid in the Utilization of Zinc by Chicks

Abstract: Results have been presented indicating that certain natural feedstuffs, such as casein, liver extract, and distillers dried solubles, contain a factor or factors capable of improving both absorption and metabolic utilization of zinc. Since zinc utilization also is improved

Cited by 44 publications

References 5 publications

Efficiency of nutrient utilization and reproductive performance of pre‐pubertal anestrous dairy heifers supplemented with inorganic and organic chromium compounds

Efficiency of nutrient utilization and reproductive performance of pre‐pubertal anestrous dairy heifers supplemented with inorganic and organic chromium compounds

Bioavailability, antioxidant and immune‐enhancing properties of zinc methionine

Effect of Replacing Part of the Soybean Meal in Turkey Poult Rations With Amino Acid and Carbohydrate Mixtures

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