Thyroid UK
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Thyroid test results normal - Monocytes low. What could it be?

Hello everyone, this is my first time posting here. I had suspected hypothyroidism and have been told now that my thyroid is normal. I have read a bit about normal vs optimal ranges and thought opinions would be nice.

I have been dealing with hairloss (and horribly low libido, brain fog, fatigue) and am starting to look at wigs and such (hoping it doesn't become necessary!). I have made an appointment with a dermatologist but they couldn't see me until Dec 30th, such a long time to continue losing hair! So I continue to search for answers. I'm 34F 153lbs/69kg

TSH 1.41 FreeT4 1.0 T3 Total 94ng/dL

Vitamin D 32 (I've seen this listed as both low and normal on various websites?)

Also, my GP didn't mention and perhaps didn't notice as they scanned my lab results that my monocytes are low. The CBC has two measurements for this list listed as;

Monocyte% 2.4% and Monocyte# 92 I believe this means my body is fighting something... I just have no idea what. I appreciate your help in advance, thank you!

4 Replies


Welcome to our forum and sorry to hear you are not feeling well.

Without the ranges (numbers in brackets) it is hard to assess thyroid hormone levels from your test results but thyroid hormone & TSH may be variable anyway when thyroid illness is present. In view of your symptoms, ask your GP to test for thyroid antibodies TPOAb & TGAb as a presence of either or both will determine Hashimotos Auto Immune Disease.

This means our own antibodies attack our thyroid gland and large amounts of hormone is released as thyroid cells die, making us feel extremely unwell. As white blood cells infiltrate the site, blood test results may show an increase in both lymphocytes and monocytes.

Hashimotos is the commonest cause of hypothyroidism and although your results look ok, you could still be experiencing the symptoms of early onset hypothyroidism. Your GP should retest your thyroid hormones in 3 months time.

Also ask him to test ferritin, Vit B12 and folate as deficiencies are common in people with low thyroid hormone. Post all results complete with ranges (numbers in brackets) for members to comment.

Is your Vit D tested in nmol/L or ng/mL ? ? .. Blood levels of 40 ng/ml – 50 ng/ml or 100 nmol/L – 125nmol/L are considered a safe optimum level ..Either way your level is too low and requires supplementing. Many members advocate supplementing Vit D3 with K2 which directs the calcium to the bones.




Getting A Diagnosis


Vit D


Welcome to the forum, Lyssahblue.

TSH 1.41 doesn't indicate primary hypothyroidism. Do you have the ref ranges (figures in brackets after results) for FT4?

VitD is optimal around 50ng/mL. You need to supplement D3 to raise vitD levels.

This link says one low monocyte count is not significant.


I am not a medical professional and this information is not intended to be a substitute for medical advice from your own doctor. Please check with your personal physician before applying any of these suggestions.

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Total T3 doesn't give you any useful information. What you need is the Free T3.

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Thanks for your responses. Relieved to see the monocyte link lists one low count as not significant. I will begin supplementing the D3 with K2. I don't currently have my results in front of me but will post the ranges as soon as I'm able. I do remember that the FreeT4 lower limit was 1.0 (which is what my result was as well) but I do not recall the upper limit. Has anyone heard of hairloss being related to something else? A different hormone maybe?


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