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Thyroid UK
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Thyroid results - advice needed to interpret please

Thyroid peroxidase antibodies 485 (<34)

Thyroglobulin antibodies >1200 (<115)

TSH 4.50 (0.2 - 4.2)

FT4 13.8 (12 - 22)

FT3 3.6 (3.1 - 6.8)

Newbie here, what do results indicate? I feel really poorly at present. I take 125mcg Levo diagnosed 2010 with hypothyroid. Feet cold, tired, periods heavy, ears ringing. Also have stage 3 adrenal fatigue. Thankyou

3 Replies

Welcome to the forum, Jtkc.

You are undermedicated to have TSH 4.5 while taking 125mcg. Ask your GP to increase dose.

The goal of Levothyroxine is to restore the patient to euthyroid status. For most patients that will be when TSH is 0.2 - 1.0 with FT4 in the upper range. FT4 needs to be in the upper range in order that sufficient T3 is converted. Read Treatment Options in thyroiduk.org.uk/tuk/about_... Email dionne.fulcher@thyroiduk.org if you would like a copy of the Pulse article to show your GP.

Thyroid peroxidase and thyroglobulin antibodies are positive for autoimmune thyroid disease (Hashimoto's). There is no cure for Hashimoto's which causes 90% of hypothyroidism. Levothyroxine treatment is for the low thyroid levels it causes. Many people have found that 100% gluten-free diet is helpful in reducing Hashi flares, symptoms and eventually antibodies.



Has ferritin or iron been checked? Low ferritin/iron can cause heavy periods.


Thankyou my ferritin in December 2017 is 64 (30 - 400) and I take 1x iron tablet. It was 61.1 (30 - 400) in September 2017. 95.5 (30 - 400) in January 2017. GP investigating possible low bone density (I am under 40) will this affect my Levo dose?



Ferritin is optimal halfway through range. I would take 2 x iron tablets daily each with 1,000mg vitamin C to aid absorption and minimise constipation.

Take iron 4 hours away from Levothyroxine.

If you have low BMD and have to take calcium that should also be taken 4 hours away from Levothyroxine.


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