After last blood test I introduced the following vitamins one at a time.
Magnesium 400mcg
Selenium 200mcg
B12 3000mcg
I was already taking Vitamin D 3000 with K2
Results received from GP yesterday are as follows:-
Serum TSH 0.24 mU/L (0.27 - 4.2)
Serum Free T4 24pmol/L (11.0 - 22.0)
Advice please. I m going to have to own up to GP that I have taken vitamins as above. She is aware that I was taking Vitamin D but not the others.
Many thanks
Sorry, but why? It's none of her business what vitamins you take. It won't have had any effect on your results, there. I don't see the problem. 
Oh. I assumed it was the vitamins that had caused the drop and raising of the results.
Highly unlikely. Are you taking levo?
Yes 100mcg. Dose went up to 100mcg in March 2018.
So, what were your last results? Have you had your antibodies tested?
Yes. Hashimotos confirmed with:
Thyroglobulin antibody 631.oo IU/mL (0.00 - 115.00)
Thyroid peroxidase antibodies 305 IU/mL (0.00 - 34.00)
OK, so your levels are going to jump around, anyway. Not much you can do about it.
But, continue to take your supplements, you need optimal nutrients for your body to be able to use thyroid hormone.
I am having phone consultation with GP next week and wondered whether she would reduce the Levo back down to 75mcg.
Ask for FT3 test before even considering a dose reduction
Thank you. I will request T3 test. I will also mention Dr Toft's article. Also, thanks re: B complex; I had forgotten about that with the B12. I am currently reading Hashimoto's protocol and trying gluten free. Not liking it very much but will persevere.
Well, strictly speaking, that's not down to her. She's there to advise you, not dictate to you. You are required to give your informed consent to any change in your treatment. If you don't want to reduce your dose, tell her so, and tell her why. Be polite but be firm.
You may also need a good quality vitamin B complex one with folate in, not folic acid, to keep all B vitamins in balance and help improve folate. Then you can reduce B12 dose a bit possibly
If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 3-5 days before any blood tests, as biotin can falsely affect test results
endo.confex.com/endo/2016en...
endocrinenews.endocrine.org...
Are you on strictly gluten free diet as you have Hashimoto's?
amymyersmd.com/2017/02/3-im...
chriskresser.com/the-gluten...
thyroidpharmacist.com/artic...
scdlifestyle.com/2014/08/th...
drknews.com/changing-your-d...
thyroidpharmacist.com/artic...
You need FT3 tested, extremely common to be a poor converter as you have Hashimoto's
Dr Toft, past president of the British Thyroid Association and leading endocrinologist, states in Pulse Magazine,
"The appropriate dose of levothyroxine is that which restores euthyroidism and serum TSH to the lower part of the reference range - 0.2-0.5mU/l.
In this case, free thyroxine is likely to be in the upper part of its reference range or even slightly elevated – 18-22pmol/l.
Most patients will feel well in that circumstance. But some need a higher dose of levothyroxine to suppress serum TSH and then the serum-free T4 concentration will be elevated at around 24-28pmol/l.
This 'exogenous subclinical hyperthyroidism' is not dangerous as long as serum T3 is unequivocally normal – that is, serum total around T3 1.7nmol/l (reference range 1.0-2.2nmol/l)."
You can obtain a copy of the articles from Thyroid UK email print it and highlight question 6 to show your doctor please email Dionne at
tukadmin@thyroiduk.org
Without FT3 test you don't know enough
Many thanks. I intended to have another medicheck blood test after taking vits for 3 months - which is next month. Free T3 in April was 5.2 pmol/L (3.10 - 6.80).
So are you on gluten free diet?
Many with Hashimoto’s are low in B1 (thiamine) and/or B5 so Vitamin B complex can help address these
Effect of vitamins on thyroid blood test
Vitamin B12 blood tests
Vitamin D, B12, ferritin, folate blood test results
Do I need to take a vitamin D supplement?
Vitamin B12 and blood tests 
