Dieta dw 60 youtube

Postato . La categoria: Annunci

1 2 3 4 5 360 voti

The amount of selenium in a given type of plant-based food depends on the amount of selenium in the soil and several other factors, such as soil p H, amount of organic matter in the soil, and whether the selenium is in a form that is amenable to plant uptake [2,6,8,9]. The selenium content of soil affects the amounts of selenium in the plants that animals eat, so the quantities of selenium in animal products also vary [2,5].Seafoods and organ meats are the richest food sources of selenium [1].Both forms can be good dietary sources of selenium [3].Selenium, which is nutritionally essential for humans, is a constituent of more than two dozen selenoproteins that play critical roles in reproduction, thyroid hormone metabolism, DNA synthesis, and protection from oxidative damage and infection [1].The most commonly used measures of selenium status are plasma and serum selenium concentrations [1].Most selenium is in the form of selenomethionine in animal and human tissues, where it can be incorporated nonspecifically with the amino acid methionine in body proteins.Concentrations in blood and urine reflect recent selenium intake.The amount of selenium in drinking water is not nutritionally significant in most geographic regions [2,6].Selenium is a trace element that is naturally present in many foods, added to others, and available as a dietary supplement.DRI is the general term for a set of reference values used for planning and assessing nutrient intakes of healthy people.

Quantification of one or more selenoproteins (such as glutathione peroxidase and selenoprotein P) is also used as a functional measure of selenium status [3].Soils contain inorganic selenites and selenates that plants accumulate and convert to organic forms, mostly selenocysteine and selenomethionine and their methylated derivatives.Both selenocysteine and selenite are reduced to generate hydrogen selenide, which in turn is converted to selenophosphate for selenoprotein biosynthesis [4].Plasma or serum selenium concentrations of 8 micrograms (mcg)/d L or higher in healthy people typically meet needs for selenoprotein synthesis [5].Other sources include muscle meats, cereals and other grains, and dairy products.

Dillo ai tuoi amici: