Hi everyone,
Does anyone have experience with or knowledge about selenium and t4 to t3 conversion? I was reviewing my diet and worked out im not getting the rdi of selenium - I'm getting about 40mcg a day against the rdi of 60mcg and I wonder if this is a contributor to my conversion problems.
If I were to increase my intake or take a supplement how long until I would expect to see improvements in conversion?
Hi Owl87,Without testing, I would not recommend you supplement above 200mcg, as doses in excess of 400mcg can be toxic . Some members choose to eat a couple of Brazil nuts a day to boost selenium, but the content per nut varies according to soil type, so you have to check labels to ensure the soil is selenium rich. If you choose a tablet, selenium l-selenomethionine or a yeast bound selenium, are recommended.
Supplementing with selenium helped to lower my antibodies within 3 months (but they are still way over range!) and helped reduce eye inflammation (I have TED). For me, Selenium did not noticeably improve my conversion rate in blood tests, so I use combination thyroid medication (T3 and T4).
Thank you for the reply! I've heard about selenium toxicity so was looking at lowest dose ones which were 100mcg as a possibility. Thank you for the tips about the tablet forms and brazil nuts!Thats good to know it helped with antibodies but not with conversion for you. I think I'll have to at least try boosting my intake to the rdi and see if it makes any difference as a start 
SeasideSusie offered advice on Brazil nuts in a previous post, so I’ve copied the link
Hi, you may have already found your solution but wanted to let you know that selenium was recommended to me and I take 200mg per day and within 3 months upon retest, my reverse free T3 had improved. Zinc is also helpful but be careful not to take too much. Hope this helps.
Selenium
Selenium...yes or no?
Selenium
Conversion
High Selenium levels!!
