This is a site you need to see, up to 1600 MICROGRAMS a day of selenomethionine.
Selenite and selenate are both inorganic forms of selenium and have an absorption rate of about 50%. This unfortunately, increases the chance of selenium toxicity. For this reason alone, organic forms of selenium, such as selenium yeast or selenomethionine, are safer and are more readily absorbed. In fact, organic forms of selenium are the only way to raise serum levels of selenium within the body. This is attributed to their bioavailability. When using organic forms of selenium, current research shows that doses up to 1600 mcg a day were well tolerated with no signs of toxicity although most experts recommend upper tolerable limits to be 400-600 mcg a day. Selenium yeast does have a higher absorption rate, (about 60-70%), than that of selenite or selenate. Yet some manufacturers simply add inorganic selenium, Selenite and selenate to yeast products, so caution is necessary when taking such products.
In addition, those with candida issues may want to avoid yeast type supplements as their specific symptoms could be compounded. Of the selenium supplements, selenomethionine has the best bioavailability with an absorption rate of 90%. It is organic and yeast free. When compared with other selenium supplements selenomethionine proves to be the most applicable and safest for long-term therapeutic use.
If a selenium deficiency causes an iodine deficiency, leaving you both selenium and iodine deficient, and supplementing with either selenium or iodine causes severe problems, (then the only solution is to supplement both selenium and iodine simultaneously and gradually.)
Wow! look at all the stuff that gets affected if either iodine or selenium get off balance!!!
Health Related Articles - Thyroid Health - Interactions Between Selenium and Iodine
P.S. Tin?? Helps iodine absorb?