Natural minerals anti-oxidants in feed ingredients | Bioplex (R) pri kravah molznicah
2006
Andrieu, S., Lexington, Kentucky (USA). Alltech.
Among many dietary factors, minerals have special importance in the maintenance of rapid and efficient growth, reproduction and immuno-competence in animal production. This concept is based on understanding the contribution of minerals in reducing the detrimental effects of free radicals and toxic metabolites on immune processes in the animal's body. It is generally considered that uncontrolled oxidation reactions caused by various stressors can not only lead to poor animal performance, but may impair the animal's immune status. Increasingly evidence suggests that at least some of the common maladies that affect animals may also result from oxidative free radical damage occurring at an increased rate once stressors are imposed on high producing animals. The anti-oxidant/pro-oxidant balance can be modulated by suboptimal diets and poor nutrient intakes, or positively affected by dietary supplementation. Therefore, feed components can change this balance, and may influence such effects as the rate of ageing and disease resistance in both human and animals. The most important step in balancing oxidative damage and anti-oxidant defense in the dairy cow's body is enhancing anti-oxidant capacity by optimizing the dietary intake of anti-oxidant compounds. Dairy cows feeds typically contain a range of different compounds that possess anti-oxidant activities, many of them being minerals or mineral dependent. Key elements involved in animal feed are Selenium (Se), Zinc (Zn), Copper (Cu), Iron (Fe) and Manganese (Mn) (Surai 2002; Surai and Dvorska 2002)
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