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Trace elements in nutritionTrace elements are also known as micronutrients and are found only in minute quantities in the body – yet they are vitally important. The quantities in which they are found are so small, that they can only be detected by spectrographic methods or by using radioactive elements. Our diets consisting of more and more refined foods are causing concern that modern man is not receiving enough of these trace elements in his food sources, and dietary supplements may be of use in combating this shortage. The interaction of these micro-nutrients are difficult to study, since they are found occurring together in various forms and amounts in the diet, and their absorption from the intestinal tract may be dependent on their relative concentrations, and might be synergetic or antagonistic, and the amount could depend on the amount of other essential trace elements in the diet. Essential nutritional elementsTo decide whether a micronutrient is "essential" or not, a wide variety of criteria is used, such as the presence of the nutrient in healthy tissue, if it appears in the fetus and newborns and if the body maintain homeostatic control over its uptake in the bloodstream or tissue and its excretion. The following are considered essential micronutrients
On the other hand, nickel, tin, vanadium, silicon, boron have recently been found as important micronutrients, whereas aluminum, arsenic, barium, bismuth, bromine, cadmium, germanium, gold, lead, lithium, mercury, rubidium, silver, strontium, titanium and zirconium is all found in plant and animal tissue, yet their importance is still being determined. Nutritional information |
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