Log in
Thyroid UK
92,041 members106,300 posts

Pure encapsulations selenium supplement 200 mcg

Dr Isabella Wentz recommends the mentioned particular brand.  I have tried the Biocare 100 mcg selenium and feel no different. I do not have hashimotos.  I know that to convert t4  to t3  mineral selenium is essential. My hair is thinning badly and losing lot of hair. My Gp said I am within the normal range, mine is TSH 3.84.  Labs did not check for T4 as the TSH fell below 5. I take 75 mcg of sodium levothyroxine. Told to come back in a years time for routine blood test. 

Has anyone tried the Pure encapsulations selenium 200 mcg and did it make any difference to your thyroid function? Any recommendation for me to try other brands also welcome.

Thank you for your help. 

14 Replies

I use Cytoplan Selenium, recommended by my private hormone specialist, it is food state so more bioavailable than some others. It comes as a small tablet rather than a capsule and doesn't smell nearly as bad as a previous brand I used.

However, hair loss and thinning can be caused by other things. Have you had ferritin, folate, Vit D and B12 tested. Low ferritin and low folate can cause hair loss.

Also you are not optimally medicated thyroid-wise. Your TSH is too high, it should be around 1 or even below for someone on thyroid meds. That could also be the cause as hair thinning/loss is a symptom of hypo. You need an increase in your levothyroxine.

If your GP won't arrange any more tests why not consider doing Blue Horizon's Thyroid plus 10 which includes ferritin, folate and B12.

1 like

SeasideSusie, thank you.  Vit D, Ferritin, and B12 had been tested and are at very good levels.  I will look into folate blood tests and Cytoplan selenium.   My GP is aware that I am not happy with my results and did tell her that the correct levels should be under 1. She said that they have to follow guidlines given by labs and mine is normal reading. I only started experiencing hair loss when I started taking sodium levotyroxine. 


Is your ferritin at least 70? That is the minimum for thyroid hormones to work. Preferably 100-150 I believe.

Cytoplan sometimes have 3 for 2 on some of their products.


Hi SeasideSusie,

My Ferritin level is 120. Thank you, I will look into Cytoplan.



TSH 1.0 and TSH 0.35 are also normal readings.  Read Dr. Toft's comments in Treatment Options in thyroiduk.org.uk/tuk/about_...  Email louise.warvill@thyroiduk.org.uk if you would like a copy of the Pulse article to show your GP.


Thank you for your help Clutter, I will do that.


I think gluten sensitivity can cause hair loss. Have you tried gluten free?  Biotin supplements are supposed to help. We use Thorne selenium:


Although I read somewhere that too much selenium can also cause hair loss :-(

Is your ferritin over 80? 


Hi Josiemum, thank you.  My Ferritin level is 120, I will look into all the supplements recommended. Thanks. I am pleased that selenium is working for you all. I will just need to try them.


Thank you, Josiesmum.

The Thorne selenium supplement, are you taking it  30 minutes  after the sodium levothyroxine as recommended by Dr Isabella Wentz or do you take it couple of hours later with food?    


Hi Peony. My daughter takes selenium but not Levo (all of the symptoms but no diagnosis) so sorry I can't help with timing. With my son (who has autism) we worked with US docs who always recommended Thorne as a very good brand, so we use them where possible. Sorry I can't be more helpful.


Thank you Josiesmum, you have been very helpful. Wishing you and your family good health. 


pure encapsulations makes a good thyroid support med that is good but your dose is too low hence tsh should be lower...i feel terrible if my tsh gets to 3 and feel best when it is near one....you could divide your dosage to be more of 100mcg etc and see how you feel or find another dr.....my dr told me hair loss is almost always connected to too little or too much thyroid hormone in his practice...and he is very old . like the post above many deficiencies can effect it.....and need to be checked hence when corrected it may take months before you see the results.....thats the frustrating part bec of the hair growth cycle


jacrjacr, thank you for your help.  I will speak to my GP. I wish all of you well.


The selenium supplement, are you taking it same time as the sodium levothyroxine, or four hours later.  


You may also like...