T4:T3: In September my TSH was 3.75 (0.27 - 4.... - Thyroid UK

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T4:T3

Mouse profile image
20 Replies

In September my

TSH was 3.75 (0.27 - 4.2)

T4 was 13.8 (12-22)

T3 was 4.56 (3.1-6.8)

This blood test was done privately. I am feeling dreadful. I am depressed, have put on weight and am exhausted. My life is very stressful at the moment so the symptoms may be due to this.

I have asked my GP for another blood test to see if I need to increase my thyroxine but they have refused because the last blood test they did was “fine” and I can only have one a year. I am on levothyroxine 50/25 on alternate days.

One thing that does puzzle me is that my T3 higher in the range than my T4. As you need the T4 to convert it to T3 how is this happening?

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20 Replies
Lalatoot profile image
Lalatoot

Mouse the body adapts to survive. The cells need t3. The thyroid produces a little T3 as well as T4 - it doesn't all come from conversion. Also TSH stimulates conversion. So your body is doing its utmost at the moment to give you enough T3 to function.

You are not fine. TSH is high, ft4 is near the bottom of range and you are having symptoms.

Someone hopefully will come along with the NICE guidelines (or do a search for them) which says to GPs that on levo TSH is best kept 2 or under. We on here know it should really be around 1.

Armed with that I would insist on an appointment. It is only through being pushy, proactive, coming from a position of knowledge backed by fact that we thyroids seem to get the treatment we need.

Mouse profile image
Mouse in reply to Lalatoot

Thank you for your reply. They have agreed that a GP will phone me next Thursday but I don’t expect much

SeasideSusie profile image
SeasideSusieRemembering

Mouse

TSH was 3.75 (0.27 - 4.2)

T4 was 13.8 (12-22)

T3 was 4.56 (3.1-6.8)

One thing that does puzzle me is that my T3 higher in the range than my T4. As you need the T4 to convert it to T3 how is this happening?

You are obviously very undermedicated to have such a high TSH and low FT4 whilst on Levo. Despite there being inadequate amount of thyroid hormone replacement your body is doing it's very best to ensure that you get enough life giving hormone (T3), this is why your FT3 is showing higher in range than FT4. Eventually this may start to fall too.

Mouse profile image
Mouse in reply to SeasideSusie

I may have to change GPs but I don’t know how to find a good one

SeasideSusie profile image
SeasideSusieRemembering in reply to Mouse

Ask around in your area, people will soon tell you how they rate their GP.

SlowDragon profile image
SlowDragonAdministrator

Approx how old are you

How long have you been left on less than the standard starter dose levothyroxine

Make an appointment with different GP and insist on increasing dose levothyroxine…..initially to 50mcg every day

Retest in 6-8 weeks

Likely to need further increases in dose levothyroxine over coming months

Unless extremely petite likely to eventually need at least 100mcg levothyroxine per day

ALWAYS book early morning test around 9am and last dose levothyroxine 24 hours before test

On levothyroxine, if you have ongoing symptoms, TSH should ALWAYS be below 2

Most people when adequately treated will have Ft4 and Ft3 at least 60-70% through range

Request/politely insist that vitamin D, folate, ferritin and B12 are also tested if not tested in last 6-12 months

Guidelines on dose levothyroxine are quite clear

pathlabs.rlbuht.nhs.uk/tft_...

Guiding Treatment with Thyroxine: 

In the majority of patients 50-100 μg thyroxine can be used as the starting dose. Alterations in dose are achieved by using 25-50 μg increments and adequacy of the new dose can be confirmed by repeat measurement of TSH after 2-3 months. 

The majority of patients will be clinically euthyroid with a ‘normal’ TSH and having thyroxine replacement in the range 75-150 μg/day (1.6ug/Kg on average).

The recommended approach is to titrate thyroxine therapy against the TSH concentration whilst assessing clinical well-being. The target is a serum TSH within the reference range. 

……The primary target of thyroxine replacement therapy is to make the patient feel well and to achieve a serum TSH that is within the reference range. The corresponding FT4 will be within or slightly above its reference range.

The minimum period to achieve stable concentrations after a change in dose of thyroxine is two months and thyroid function tests should not normally be requested before this period has elapsed.

Blood tests should be every 2-3 months UNTIL all symptoms resolved

Only after that is it annual testing

Mouse profile image
Mouse

I am 62 and have been on Levothyroxine since 2003. I am very sensitive to any increases. A previous GP tried to get me up to 75 a day but I couldn’t cope on it. I couldn’t sleep and felt anxious all the time. I probably need to increase more slowly. My initial dose was 25 on alternate days.

My vitamin levels were checked in September and are ok. I take vit D, Iron and B12. Folate is always high, probably because I am vegetarian

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

Looking at previous posts you use to take alternative replacement thyroid hormones

Which brand of levothyroxine are you currently taking

many people find different brands are not interchangeable

Many people can’t tolerate Teva brand

Teva is only brand that makes 75mcg tablets

Many people need to increase dose levothyroxine slowly

So increase to 50mcg every day

Retest in 6-8 weeks

As vegetarian and supplementing iron you MUST get full iron panel test for anaemia including ferritin 2 or 3 times a year

What were actual vitamin D, folate and B12 results

Exactly what vitamin supplements are you currently taking

Mouse profile image
Mouse in reply to SlowDragon

Folate 12.72 (>3.89)

B12 69.7 (37.5-150)

Vit D 77 (50-200)

Ferritin 66.5 (13-150)

Levothyroxine brands:

wockhardt 25mcg

Accord 50mcg was on MercuryPharma but new prescription is Accord

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

B12, vitamin D and ferritin all borderline

How long ago were these tested

Exactly what vitamin supplements are you currently taking

optimal vitamin levels are

B12 at least over 70 and between 100-150 better

Vitamin D at least over 80 and between 100-125nmol may be more beneficial

Ferritin at least over 70 and nearer 100 may help

Request increase in levothyroxine to 50mcg daily

Mouse profile image
Mouse in reply to SlowDragon

I was tested in September. I take B12 by oral spray, D3 and Iron bisglycinate. I also take magnesium malate and have recently started taking Reishi

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

How much vitamin D

Is it mouth spray?

supplementing a good quality daily vitamin B complex, one with folate in (not folic acid) 

This can help keep all B vitamins in balance and will help improve B12 levels too

Difference between folate and folic acid 

chriskresser.com/folate-vs-...

Many Hashimoto’s patients have MTHFR gene variation and can have trouble processing folic acid.

thyroidpharmacist.com/artic...

B vitamins best taken after breakfast

Thorne Basic B recommended vitamin B complex that contains folate, but they are large capsules. (You can tip powder out if can’t swallow capsule) 

currently cheapest on EBay

IMPORTANT......If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 5-7 days before ALL BLOOD TESTS , as biotin can falsely affect test results

endo.confex.com/endo/2016en...

endocrinenews.endocrine.org...

In week before blood test, when you stop vitamin B complex, you might want to consider taking a separate methyl folate supplement and continue separate B12

Low B12 symptoms 

b12deficiency.info/signs-an...

methyl-life.com/blogs/defic...

With serum B12 result below 500, (Or active B12 below 70) recommended to be taking a B12 supplement as well as a B Complex (to balance all the B vitamins) initially for first 2-4 months.

once your serum B12 is over 500 (or Active B12 level has reached 70), you may be able to stop the B12 and just carry on with the B Complex.

But as vegetarian likely to need separate B12 3-4 days week ongoing

B12 drops 

healthunlocked.com/thyroidu...

B12 sublingual lozenges 

amazon.co.uk/Jarrow-Methylc...

cytoplan.co.uk/shop-by-prod...

Mouse profile image
Mouse in reply to SlowDragon

I will give the B complex a go. The D3 I am taking is 1000iu per tablet. I take one per day

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

suggest you double vitamin D

Especially in winter

Possibly all year

Retest in 3/4 months

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

iron supplements

Never supplement iron without doing full iron panel test for anaemia first and retest 3-4 times a year if self supplementing. It’s possible to have low ferritin but high iron 

Medichecks iron panel test 

medichecks.com/products/iro...

Iron and thyroid link

healthunlocked.com/thyroidu...

Excellent article on iron and thyroid 

cambridge.org/core/journals...

Posts discussing why important to do full iron panel test

healthunlocked.com/thyroidu...

healthunlocked.com/thyroidu...

SlowDragon profile image
SlowDragonAdministrator

Do you have autoimmune thyroid disease, also called Hashimoto’s, usually diagnosed by high thyroid antibodies?

About 90% of primary hypothyroidism is autoimmune thyroid disease

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.

Ever had thyroid antibodies tested or ultrasound scan of thyroid if both antibodies are negative

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 on here that all thyroid blood tests early morning, ideally just before 9am and last dose levothyroxine 24 hours before test 

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

List of private testing options and money off codes

thyroiduk.org/getting-a-dia...

Medichecks Thyroid plus antibodies and vitamins

medichecks.com/products/adv...

Blue Horizon Thyroid Premium Gold includes antibodies, cortisol and vitamins

bluehorizonbloodtests.co.uk...

Mouse profile image
Mouse in reply to SlowDragon

yes, I have Hashimotos. Thyroid Peroxidase Antibodies we’re 217 (<34) in September. They are fairly stable. Have them checked by Medichecks every couple of years

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

So have you had coeliac blood test done

Are you on strictly gluten free diet or dairy free diet

Hashimoto's frequently 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. 

According to Izabella Wentz the Thyroid Pharmacist approx 5% with Hashimoto's test positive for coeliac, but a further 80% find 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 slowly lower TPO antibodies 

While still eating high gluten diet ask GP for coeliac blood test first or buy test online for under £20, just to rule it out first 

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.

Mouse profile image
Mouse

I have been gluten free for 5 or 6 years now and I am very strict about it. I am almost dairy free, just have a small amount of hard cheese occasionally

SlowDragon profile image
SlowDragonAdministrator in reply to Mouse

Helpful if you add that on your profile page

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