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Thyroid UK
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Thyroid Results - Please Help

Hello - im not one to panic but being my mother had thyroid cancer....im starting to get anxious.

After two blood tests, and an ultrasound I was found to have hypoactive thyroid and am 75 levothryoxine / day.

I just got my third blood tests and results are as follows:

Thyroglobulin Antibodies 13H (normal < or =1)

Thyroid Peroxidase 24H (normal <9 iu/mL)


T4 Free and T3 Free both in range

Questions: what is the H stand for in the thyroid antibodies test? Do I need to alter the dosage of my medicine? Thanks for any and all help!

2 Replies

The H stands for High, it means you have a high level of the thyroid antibodies and these can impact on the thyroid function so that needs monitoring. These have nothing to do with cancer but part of an auto immune thyroid condition likely Hashimotos.

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Your results show your antibodies are high this is Hashimoto's, (also known by medics here in UK more commonly as autoimmune thyroid disease).

About 90% of all hypothyroidism in Uk is due to Hashimoto's

Can you add your FT4 and FT3 results and ranges

Essential to test vitamin D, folate, ferritin and B12. Always get actual results and ranges. Post results when you have them, members can advise

Hashimoto's affects the gut and leads to low stomach acid and then low vitamin levels

Low vitamin levels affect Thyroid hormone working

Poor gut function can lead leaky gut (literally holes in gut wall) this can cause food intolerances. Most common by far is gluten

According to Izabella Wentz the Thyroid Pharmacist approx 5% with Hashimoto's are coeliac, but over 80% find gluten free diet helps significantly. Either due to direct gluten intolerance (no test available) or due to leaky gut and gluten causing molecular mimicry (see Amy Myers link)

But don't be surprised that GP or endo never mention gut, gluten or low vitamins. Hashimoto's is very poorly understood

Changing to a strictly gluten free diet may help reduce symptoms, help gut heal and slowly lower TPO antibodies

Ask GP for coeliac blood test first

Persistent low vitamins with supplements suggests coeliac disease or gluten intolerance









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:



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