Thyroid UK
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Results of blood tests so confused - Please Help :0(

Hi, I posted 3 days ago and was asked to add my blood results, I have also done this new post as I wasn't sure if that's what I was suppose to do?

Sons results are - Dec 2015

Serum free T4 10.8 pmol/L (9.00-24.00 pmol/L)

Serum TSH 3.7 mu/L (0.35-5.00 mu/L)

Also states TSH + FT4 normal no action

Dec 2016

Serum free T4 11.3 pmol/L (9.00-24.00 pmol/L)

Serum TSH 5.5 mu/L (0.35-5.00 mu/L)

Also states TSH + FT4 Abnormal Results Needs further tests - TFT? then it states serum TSH satisfactory (normal for this patient no action)

Feb 2017

Serum free T4 12.3 pmol/L (9.00-24.00 pmol/L)

Serum TSH 2.7 mu/L (0.35-5.00 mu/L)

Also states normal no action.

Se thyroid peroxidase Ab conc 63 iu/ml (0.00-50.00 iu/ml)

(Abnormal needs rpt TFT in 3/12 - borderline TFT)

On another part of the Feb 2017 test it states Full blood count abnormal needs further tests ferretin/B12/folic acidnormocytic anaemia?

Just had his latest results for the above (Feb 2017)

Serum Ferritin 54 ug/L (15.00 - 300.00 ug/L) - normal

Serum Folate 1.7 ug/L (2.00 - 17.00 ug/L) - abnormal prescribe folic acid

Plasma vitamin B12 437 ng/L (200.00 - 900.00 ng/L) - normal

My own results are

Dec 2016

Serum free T4 11.5 pmol/L (9.00-24.00 pmol/L)

Serum TSH 6.6 mu/L (0.35-5.00 mu/L)

Also states T4 level normal no action and TSH abnormal needs repeat test in 3/12 and consider anti-TPOAb

This has happened a few times over the years, I am always told everything is normal and retest in a year.

Also my Haematocrit is 0.36 ratio (0.37-0.47 ratio) I don't know what this is.

I hope this is ok to post and makes sense to someone, thank you so much for any help.

Claire xx

1 Reply


Your son's thyroid peroxidase antibodies are positive for autoimmune thyroiditis (Hashimoto's) which is why his thyroid levels have been fluctuating. There is no cure for Hashimoto's which eventually causes 90% of hypothyroidism. Treatment will be 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. G-F diet may delay the progression to hypothyroidism. Supplementing up to 200mcg selenium will support the thyroid gland.

Your son's thyroid levels are currently euthyroid (normal) but TSH >2.0 indicates his thyroid is struggling. NHS won't diagnose hypothyroidism until TSH is >5.0 or FT4 <9.0.

Ferritin is optimal halfway through range so your son could supplement iron with 1,000mcg vitamin C to aid absorption and minimise constipation.

Folate is deficient. My GP prescribed 5mg folic acid for a couple of months to correct folate deficiency.

B12 437 probably doesn't need supplementing. If your son has symptoms of B12 deficiency outlined in the link below he/you should ask for advice on

Protocol is to retest the first abnormal TSH result 3 months later to rule out a virus, infection or other non-thyroidal illness raising TSH.

This link will explain low haematocrit

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