Really low TSH : Hi, I have been on... - Thyroid UK

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Really low TSH

KC8990 profile image
6 Replies

Hi,

I have been on Levothyroxine for about 2 years. I started at 25mcg and have now been worked up to 100mcg. I had a recent TSH check and it’s come back as 0.05. I asked at the reception and was told this result but there was no one to discuss it with. I was called by a nurse the following day. They seemed happy with the results, but I wonder if it’s too low?

For extra information; I am 34, have PCOS and have been having IVF. I have had some problems with recurrent early losses and thyroid was found to be an issue but was poorly managed by my IVF consultant (in my opinion). I was referred to a recurrent loss specialist obs and gynae Consultant and she monitored my TSH closely and helped me get it down. Last check with her was 1.2, before she discharged me.

Thank you.

edited to add; I am TPO positive and have a FT4 of 19.6 on my last blood test. This is pretty much static from what I can remember from memory.

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SlowDragon profile image
SlowDragonAdministrator

welcome to the forum

Just testing TSH is completely inadequate

Bloods should be retested 6-8 weeks after each dose change or brand change in levothyroxine

For full Thyroid evaluation you need TSH, FT4 and FT3 tested

Also both TPO and TG thyroid antibodies tested at least once to see if your hypothyroidism is autoimmune

Very important to test vitamin D, folate, ferritin and B12 at least once year minimum

Low vitamin levels are extremely common when hypothyroid, especially with autoimmune thyroid disease

Low iron/ferritin often linked to miscarriage

Is your hypothyroidism autoimmune?

About 90% of primary hypothyroidism is autoimmune thyroid disease, usually diagnosed by high TPO and/or high TG thyroid antibodies

Autoimmune thyroid disease with goitre is Hashimoto’s

Autoimmune thyroid disease without goitre is Ord’s thyroiditis.

Both are autoimmune and generally called Hashimoto’s.

Significant minority of Hashimoto’s patients only have high TG antibodies (thyroglobulin)

20% of autoimmune thyroid patients never have high thyroid antibodies and ultrasound scan of thyroid can get diagnosis

In U.K. medics hardly ever refer to autoimmune thyroid disease as Hashimoto’s (or Ord’s thyroiditis)

Recommended that all thyroid blood tests early morning, ideally just before 9am, only drink water between waking and test and last dose levothyroxine 24 hours before test

Is this how you do your tests?

This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip)

Private tests are available as NHS currently rarely tests Ft3 or all relevant vitamins

Testing options and includes money off codes for private testing

thyroiduk.org/testing/

Medichecks Thyroid plus BOTH TPO and TG antibodies and vitamins

medichecks.com/products/adv...

Blue Horizon Thyroid Premium Gold includes BOTH TPO and TG antibodies, cortisol and vitamins

bluehorizonbloodtests.co.uk...

Only do private testing early Monday or Tuesday morning.

Link about thyroid blood tests

thyroiduk.org/testing/thyro...

Link about Hashimoto’s

thyroiduk.org/hypothyroid-b...

Symptoms of hypothyroidism

thyroiduk.org/signs-and-sym...

Tips on how to do DIY finger prick test

support.medichecks.com/hc/e...

Medichecks and BH also offer private blood draw at clinic near you, or private nurse to your own home…..for an extra fee

KC8990 profile image
KC8990 in reply to SlowDragon

Sorry, TPO +ve, FT4 is 19.6. I can’t remember my last FT3 result.

SlowDragon profile image
SlowDragonAdministrator in reply to KC8990

What’s range on Ft4

Was test done with last dose levothyroxine 24 hours before test

Essential to test Ft3 too

And get vitamin results

So high TPO antibodies = autoimmune

Have you had coeliac test done?

If not get tested via GP or buy test

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. Dairy is second most common.

A trial of strictly gluten free diet is always worth doing

Only 5% of Hashimoto’s patients test positive for coeliac but a further 81% of Hashimoto’s patients who try gluten free diet find noticeable or significant improvement or find it’s essential

A strictly gluten free diet helps or is essential due to gluten intolerance (no test available) or due to leaky gut and gluten causing molecular mimicry (see Amy Myers link)

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

While still eating high gluten diet ask GP for coeliac blood test first as per NICE Guidelines

nice.org.uk/guidance/ng20/c...

Or buy a test online, about £20

Assuming test is negative you can immediately go on strictly gluten free diet 

(If test is positive you will need to remain on high gluten diet until endoscopy, maximum 6 weeks wait officially) 

Trying gluten free diet for 3-6 months. If no noticeable improvement then reintroduce gluten and see if symptoms get worse

chriskresser.com/the-gluten...

amymyersmd.com/2018/04/3-re...

thyroidpharmacist.com/artic...

drknews.com/changing-your-d...

Non Coeliac Gluten sensitivity (NCGS) and autoimmune disease

pubmed.ncbi.nlm.nih.gov/296...

The predominance of Hashimoto thyroiditis represents an interesting finding, since it has been indirectly confirmed by an Italian study, showing that autoimmune thyroid disease is a risk factor for the evolution towards NCGS in a group of patients with minimal duodenal inflammation. On these bases, an autoimmune stigma in NCGS is strongly supported

nuclmed.gr/wp/wp-content/up...

In summary, whereas it is not yet clear whether a gluten free diet can prevent autoimmune diseases, it is worth mentioning that HT patients with or without CD benefit from a diet low in gluten as far as the progression and the potential disease complications are concerned

restartmed.com/hashimotos-g...

Despite the fact that 5-10% of patients have Celiac disease, in my experience and in the experience of many other physicians, at least 80% + of patients with Hashimoto's who go gluten-free notice a reduction in their symptoms almost immediately.

Similarly few months later consider trying dairy free too. Approx 50-60% find dairy free beneficial

With loads of vegan dairy alternatives these days it’s not as difficult as in the past

Post discussing gluten

healthunlocked.com/thyroidu...

SlowDragon profile image
SlowDragonAdministrator

Pregnancy guidelines

thyroiduk.org/having-a-baby/

NICE guidelines that if hypothyroid or subclinical you should see endocrinologist BEFORE TTC

cks.nice.org.uk/topics/hypo...

Important - See pages 7&8

btf-thyroid.org/Handlers/Do...

Also here - dose increase in levothyroxine as soon as pregnancy test confirms conception

cuh.nhs.uk/patient-informat...

thyroidpharmacist.com/artic...

Low ferritin, low thyroid levels and miscarriage

preventmiscarriage.com/iron...

Low iron and hypothyroid

endocrineweb.com/news/thyro...

Folate and B12 and Neural tube defects and autism

healthunlocked.com/thyroidu...

Stony2 profile image
Stony2

I believe you’re spot on ! After 3 years battle with my GP I finally was prescribed 50mcg of levothyroxine which brought my TSH to around 5 and still feeling dreadful.

Finally got referred to an endo unit at the local hospital last month and received a letter to say the target level should between 0.3-2.5mIU/L and once my updated blood results were updated they would increase my levels slightly.

Still waiting to hear as it was over a month ago !

Providing you’re feeling ok there is nothing to worry about. And do remember there will be some fluctuations which is perfectly normal.

Hope that helps.

Rupert- profile image
Rupert-

Hi sorry,I'm new to this forum I only been on levothyroxine for 1 week so unfortunately unable to help but there are loads of people on here who are really knowledgeable and could help.Regards

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