Thyroid UK
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Summer Dosage question??

My April Results were :

TSH 1.04 mIU/L 0.27 -4.20

T4 17.5 pmol/L 12.00 -22.00

T3 3.86 pmol/L 3.10 -6.80

My May 18th results:

TSH 1.33 mIU/L 0.27 - 4.20

T4 *24.1 pmol/L 12.00 - 22.00

T3 4.88 pmol/L 3.10 - 6.80

No change in meds both 75mcg/100mcg

I started folic acid and the weather has heated up

I was getting palpation and some hyper symptoms that is why i took the test

So now iv dropped to 75mcg and 50 mcg on weekends

Any advice or insight as to why my t4 risen so much ? and can i get hyper symptoms for t4 being high and not t3 ? is it because t4 isnt being converted properly because looks like my conversion rate is at 5:1


3 Replies


Your conversion was poor with the first lot of results.

Don't forget that your Hashi's complicates things, your results can fluctuate with antibody activity. That could be why you're getting symptoms rather than the warm weather.


So if my antibodies reduce my levels can increase? Because i have been trying to eat 1 or 2 brazil nuts a day?

Thanks for reply



When the antibodies attack, the dying cells dump a load of thyroid hormone into the blood and this can cause TSH to become suppressed and Free T4 and Free T3 to be very high or over range. What I'm saying is that an antibody attack could have caused your high FT4 and the symptoms you mentioned. These "Hashi's swings" are temporary and things (results and symptoms) go back to normal when the antibody attack is over and things settle down again.

So reducing antibodies is a good thing. Always advised here to help reduce antibodies is a strict gluten free diet and supplementing with selenium l-selenomethionine 200mcg daily. Your brazil nuts may or may not contain selenium, it depends where they were grown as to whether there was enough selenium in the soil for there to be a decent amount in the nuts. Does the packet say "Grown in selenium rich soil" and does it give the region where they were grown? Eastern Amazon and Central Brazil have the highest amount of selenium in nuts. Where Hashi's is concerned, and supplementing selenium is important, the only way you'll know you're getting enough is to buy a decent selenium supplement.


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