Jo5454 From what I have read 200mcg selenium should be fine, I certainly wouldn't go beyond that.
One article I've seen easy-immune-health.com/sele... states
Selenium Dosage in Studies
Many studies have attempted to determine the 'Just Right' selenium dosage, and while there are no clear cut answers as to the exact optimal dose for optimal health, the studies that HAVE been done give us some clues.
200 mcg (micrograms) is the most frequently used dose in studies that obtained beneficial results. Most of these studies were done over relatively short periods of time, but some were done over long periods of time, so it seems that 200 mcg per day is a relatively safe dosage to take for relatively long periods of time.
One study that analyzed many other studies on selenium found that dosages of about 300 mcg per day of selenium began to show ill effects on the thyroid gland as well as hair and nail weakening and loss.
So from this study, we can determine that 300 mcg per day of selenium is likely to be unnecessary and may cause harm over the long term. So, taking between about 100 mcg to 200 mcg seems to be the 'just right' selenium dosage that is beneficial for health, but that does not cause problems in MOST people. Again, this will be dependent upon how much you ALREADY get in your diet, your specific metabolism and other factors that science may not even know about.
If you read the article it tells you which are the best forms to take.
Your natural Vitamin D should, theoretically, be higher in the summer when we have more sunshine, but I think you have to expose some bare skin (arms probably enough) for about 15-20 minutes daily, without sunscreen, to get any benefit. I don't do well in hot weather, even 5 minutes of sun with trousers on and my legs feel as though they're burning.
Your disturbed sleep will affect your adrenals. My sleep has been dire for as long as I can remember, takes me ages to get off and I wake up then drift off again. Like you, I am more tired when I get up than when I went to bed, my sleep is totally unrefreshing. It is a form of stress, my 24 hour adrenal stress test with Genova showed my cortisol levels all at the top end of the range from the early morning one throughout the day, the only one mid range was the evening one. Thyroid and adrenals are connected.
I've just looked at a previous post of yours where you put your BH test results
TSH 6.28 (0.27-4.20)
T4 total 119.6 (64.5-142)
Free t4 16.15 (12-22)
Free t3 5.29 (3.1-6.8)
Antithyroid peroxidase 9.0 <34
Anti thyroglobulin abs 16.1 <115
and comparing to previous TSH results of 0.95 (August) and 3.18 (March), your TSH does seem to be dancing around a bit. Also your FT4 has dropped from 14 to 12 previously and now up to 16.15. Of course the ranges might not be the same so it would be interesting to see the ranges for the older tests.
From that test your conversion appears to be OK with FT4:FT3 ratio being 3.05 : 1, good conversion is 4:1 or lower. Selenium helps with reducing antibody attacks and conversion. I'm wondering why you are considering supplementing with selenium? Have you ever had antibodies tested before to compare those with?
Have you show those BH test results to your GP? If so, what did he say about your raised TSH?