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You only need a few micrograms a day, but your body cannot function without it. Selenium is a trace element (a mineral of which your body uses tiny amounts). These tablets by NOW Foods each contain 100mcg of selenium, bound to the amino acid methionine. That is 182 percent of the reference intake, in a small tablet that you take with food.
Selenium does not work on its own, but as part of proteins called selenoproteins. Your body incorporates it as a special amino acid, selenocysteine. There are about 25 of these selenoproteins known, and a number of them are enzymes. The best known are the glutathione peroxidases. They clear away harmful peroxides before they can damage cell membranes. Selenium contributes to the protection of cells against oxidative damage. Other selenoproteins are in your thyroid gland. There they convert the thyroid hormone T4 into the active form T3. Selenium contributes to the normal functioning of the thyroid gland. It is therefore no coincidence that the thyroid contains the most selenium per gram of all organs. In addition, selenium plays a role in your immune system. Selenium contributes to the normal functioning of the immune system.
Selenium exists in different forms. In cheap supplements you often find sodium selenite, an inorganic salt. NOW Foods opts for L-selenomethionine, the organic form in which selenium also occurs in grain, nuts and meat. In short: you get selenium in the form that also occurs in regular food. You may notice that the label mentions 20mg L-selenomethionine, while there is 100mcg of selenium in it. That is not a contradiction. The 20mg is the weight of the raw material, a diluted mixture in which the selenomethionine is evenly distributed. Such a dilution is necessary, because 100mcg is a tenth of a milligram, an amount that you can barely see with the naked eye. By spreading the selenium over more powder, each tablet gets exactly the same dose.
What many people do not know: how much selenium is in your food depends heavily on the soil on which it grows. Brazil nuts are a well-known rich source, which can contain more than 50mcg per nut. Furthermore, you get selenium from fish, eggs, meat and whole grains. The reference intake for adults is 55mcg per day. EFSA uses 255mcg as a safe upper limit for adults. With one tablet of 100mcg you stay well below that, and even with two tablets per day, as the maximum advice on the bottle, you are still below it. In addition to immunity and thyroid, the EU knows three other claims for selenium. Selenium contributes to the maintenance of normal hair. Selenium contributes to the maintenance of normal nails. And for men: selenium contributes to normal spermatogenesis.
With 100 tablets you have selenium at home for well over three months with one per day. Small tablet, organic form, a clear dose.
The organic form also found in grains and nuts.
One tablet provides 182 percent of the reference intake. Even at the maximum recommended two per day, you remain below the EFSA upper limit of 255mcg.
Selenium contributes to the normal function of the immune system and thyroid, and to the protection of cells from oxidative damage. In addition, there are claims for hair, nails and spermatogenesis.
In addition to selenium, the tablet contains only cellulose and plant-based stearates. Suitable if you avoid yeast or gluten.
* Percentage van de referentie inname volgens Verordening (EU) Nr. 1169/2011.
** Reference intake unknown.
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Selenium is a building block of enzymes called selenoproteins. Selenium contributes to the normal function of the thyroid gland and immune system, and to the protection of cells from oxidative damage. You only need a few micrograms of it per day.
The reference intake for adults is 55mcg per day. EFSA sets the safe upper limit at 255mcg per day for adults. This tablet provides 100mcg; the advice is 1 to 2 tablets per day, together with what you get from food.
In Brazil nuts, fish, shellfish, eggs, meat and whole grains. The levels in plant-based products depend heavily on the soil they grow in. Brazil nuts are so rich that just one nut can provide a substantial dose.
Yes, which is why dosage is important. EFSA considers a consistent intake of more than 255 mcg per day to pose an increased risk. Therefore, do not take more than two tablets per day, and be aware of any Brazil nuts or other selenium supplements you may be taking. If you live in an area with selenium-rich soil, consult your doctor first.
It is selenium bound to the amino acid methionine. Your gut absorbs it in the same way as methionine from proteins. It is the form in which selenium also naturally occurs in grains and nuts.
Selenomethionine is an organic form, while sodium selenite is an inorganic salt. Selenomethionine is the form that also occurs naturally in grains and nuts.
