Are there different forms of selenium?
In the nutraceutical market selenium can be purchase either as a salt form or in an organically bound form. The salts are sodium selenite and sodium selenate and both have been shown to be less bioavailable than organically bound forms of selenium. The organically forms of selenium are high selenium yeast or selenomethionine. High selenium yeast contains multiple organic selenium compounds whereas selenomethionine is a single amino acid (methionine) with a selenium molecule attached to it. There are several qualities of high selenium yeast products with the best one to use being a product that certifies that it contains 100% organically bound selenium; as many high selenium yeast products can not certify this claim.
