Zinc requirements and the risks and benefits of zinc supplementation

Maret, Wolfgang; Sandstead, Harold H.

doi:10.1016/j.jtemb.2006.01.006

Cited by 922 publications

(663 citation statements)

References 155 publications

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“…This is in agreement with previous studies that reported that geometric and positional isomerization of linoleic acid increased as a result of heating (above 1808C;Juané da et al, 2003;Bou et al, 2005b;Destaillats and Angers, 2005), and that di-trans isomers were the main CLAs formed due to geometrical isomerization that increased with temperature (1808C, 2008C or 2208C), heating time (24 to 240 h), presence of oxygen (Destaillats and Angers, 2005) and when polar compounds were over 30% (w/w;Juané da et al, 2003).…”

Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

“…Furthermore, as with other elements, their bioavailability might be affected by the presence of other elements. For instance, Bou et al (2005a and2005c) found increases in the content of Se in chicken meat after dietary supplementation with Zn, while others have found decreases in the Cu content as a result of high dietary Zn (Maret and Sandstead, 2006).As the presence of moderately high amounts of primary and/ or secondary oxidation compounds in fats added to feeds is plausible, it is necessary to study their possible effects on animal tissue FA composition. Furthermore, several compounds with antioxidant activity might also be supplemented in feeds, but their effects on tissues might be altered by the presence of primary and/or secondary oxidation compounds in feeds.…”

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confidence: 99%

“…It has been shown that it is possible to increase the element content in meat and other animal products through dietary supplementation with minerals. As other elements, Zn and Se are of nutritional interest because their usual intake by some communities, for instance elderly people, is often under dietary recommendations (Food and Nutrition Board, 2000a and2000b;Maret and Sandstead, 2006). However, dietary supplementation with Zn and Se has been poorly studied, and it is even so less in rabbit feeding.…”

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confidence: 99%

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Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Tres

Bou

Codony

et al. 2010

Animal

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The effects of the addition of heated oils to feeds (3%, w/w) and the dietary supplementation with a-tocopheryl acetate (TA; 100 mg/kg) and Zn (200 mg/kg) on rabbit tissue fatty acid (FA) composition and on the Zn, Cu, Fe and Se content in meat were assessed. Heating unrefined sunflower oil (SO) at 558C for 245 h increased its content in primary oxidation products and reduced its a-tocopherol content. However, this did not significantly affect tissue FA composition. Heating SO at 1408C for 31 h increased its content in secondary oxidation products and in some FA isomers as c9,t11-CLA and di-trans CLA. This led to increases in di-trans CLA in liver and in t9,c12-18:2 in meat. The c9,t11-CLA was the most incorporated CLA isomer in tissues. The dietary supplementation with a-TA did not affect the FA composition of plasma, liver or meat. The cooking of vacuum-packed rabbit meat at 788C for 5 min reduced significantly but slightly its polyunsaturated FA content. The dietary supplementation with Zn did not modify the content of Zn, Fe or Se in meat, but it reduced its Cu content. On the other hand, it increased the content of some FAs in meat when SO heated at 1408C for 31 h was added to feeds.Keywords: heated oils, fatty acid composition, plasma, liver, meat Implications An animal's diet has an influence on the composition of its tissues, which can be used to improve the nutritional value of meat, for instance modifying its fatty acid (FA) composition or increasing its mineral content. Unsaturated fat products used in feeds are prone to oxidation that can occur both during their production process and their storage, leading to a high content of oxidation compounds and altering their FA profile. This might affect the tissue composition, and thus the meat nutritional value. We studied the influence of the addition of oxidized oils and minerals to rabbit feeds on the FA composition of its plasma, liver and meat and on its meat element content. IntroductionFatty acid (FA) composition of animal tissues can be modified by the type and amount of dietary fat (Wood and Enser, 1997). Dietary recommendations for humans suggest reducing the intake of not only fat and cholesterol but also saturated FAs (SFA) and trans FA, and increasing the intake of polyunsaturated FAs (PUFAs), mainly those from the n-3 series (Food and Nutrition Board, 2005). Therefore, in order to obtain more healthy meat, several unsaturated fat sources have been incorporated to feeds to nutritionally improve meat FA composition (Wood and Enser, 1997).However, unsaturated fat sources are prone to oxidation that can occur both at low and high temperatures. At low temperatures, for instance during storage of unsaturated fats at ambient temperature, lipid hydroperoxides (LHPs) increase until they reach a plateau, and then decompose into secondary oxidation compounds. At high temperatures, decomposition of LHP is faster and isomerization of FA is also favored, leading to the appearance of both geometric and positional FA isomers, as several trans FA and conjugate...

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Section: Resultssupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Tres

Bou

Codony

et al. 2010

Animal

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“…A higher SCL-10 score indicates a greater number of symptoms (score ranging between 1·0 and 4·0). An important source of Zn in the Western diet is meat (17) . Frequency of meat intake during the preceeding week, smoking habits and sociodemographic variables were also obtained from the self-administered questionnaires.…”

Section: Mental Health Sociodemographic Characteristics and Lifestylmentioning

confidence: 99%

Risk of malnutrition and zinc deficiency in community-living elderly men and women: the Tromsø Study

Kvamme

Grønli

Jacobsen

et al. 2014

Public Health Nutr.

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Objective: Elderly people may be at particular risk of Zn deficiency due to an increased prevalence of malnutrition. The aim of the present study was to evaluate the Zn status in community-living elderly people at risk of malnutrition. Design: Cross-sectional population-based survey. Individuals at risk of malnutrition were identified by the Malnutrition Universal Screening Tool. Zn status was assessed by measuring serum Zn. Logistic regression was performed to evaluate the association between the risk of malnutrition and Zn deficiency. Setting: Municipality of Tromsø, Norway. Subjects: Random sample of 743 men and 778 women aged 65-87 years. Results: Zn deficiency was found in 10·1 % of the participants, including 13·1 % of the men and 7·3 % of the women. Among the men and women at risk of malnutrition, 31·0 % and 12·7 %, respectively, had Zn deficiency. In a model adjusted for age, gender, serum albumin and smoking status, Zn deficiency was positively associated with the risk of malnutrition (OR = 2·2; 95 % CI 1·3, 3·6). Conclusions: Overall, Zn deficiency was found in one out of ten community-living elderly people and was associated with the risk of malnutrition. Our results encourage the assessment of Zn status in elderly people at risk of malnutrition, with a special emphasis on elderly men.

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Zinc supplementation for preventing mortality, morbidity, and growth failure in children aged 6 months to 12 years of age

Mayo‐Wilson

Jean

Imdad

et al. 2014

Cochrane Database of Systematic Reviews

150

128

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BackgroundZinc deficiency is prevalent in low-and middle-income countries, and contributes to significant diarrhoea-, pneumonia-, and malariarelated morbidity and mortality among young children. Zinc deficiency also impairs growth. ObjectivesTo assess the effects of zinc supplementation for preventing mortality and morbidity, and for promoting growth, in children aged six months to 12 years of age.

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Zinc requirements and the risks and benefits of zinc supplementation

Cited by 922 publications

References 155 publications

Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Oxidized oils and dietary zinc and α-tocopheryl acetate supplementation: effects on rabbit plasma, liver and meat fatty acid composition and meat Zn, Cu, Fe and Se content

Risk of malnutrition and zinc deficiency in community-living elderly men and women: the Tromsø Study

Zinc supplementation for preventing mortality, morbidity, and growth failure in children aged 6 months to 12 years of age

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