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Selenium Powder Source: Larger Jar of Same Powder Purity: 99% Selenium is an interesting element. Besides being a key element in some interesting semiconductors (CdSe solar cells, nanoparticles, etc.), it is also an essential trace element in the body. Getting less than 5mcg a day on average will cripple your metabolism, but taking 5mg is a lethal dose. Who would have thought... only three orders of magnitude?! |