Low TSH, high T4, but still feeling hypothyroid - Thyroid UK

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Low TSH, high T4, but still feeling hypothyroid

CraftyGamer19 profile image
5 Replies

Hi all, I'm hoping someone can help me with this. Since being diagnosed with Hashimoto's around 2 years ago, I've continuously increased my levothyroxine dose, and have seen little improvement in symptoms and lab results. My TSH has consistently been in the 4.5-20 range and my Free T4 has consistently been in the middle to top of the range. As far as symptoms go, I'm fatigued, constipated, depressed, but also regularly have problems with restless legs, excessive sweating, and occasionally hot flashes (the sweating and hot flashes seem to be a blood sugar and/or hormonal problem), and I thought I had become pretty good at recognizing when I feel hypothyroid and when I need to increase my dose.

But my most recent test results are very confusing.

TSH: 0.109 (range: 0.45-4.5)

Free T4: 1.80 (range: 0.82-1.77)

My TSH has dropped dramatically and my T4 is just above the reference range, which is the complete opposite of what it usually is. Yet, I still feel hypothyroid. The fatigue continues to slowly get worse and worse, just as it always has. I still occasionally struggle with lack of motivation and depression. I'm still always constipated. But my labs somehow show the opposite of what I'm feeling.

The only thing I've changed is my diet, and even that I've only slightly changed. I've been trying to eat small but more frequent meals (and I haven't been very good at that because I sometimes have to work 8 hour shifts without any break for food), and I've been eating more fruits and a few more vegetables (I've not been very good about that either)

I've done this because I've found that keeping my blood sugar at a more consistent level has dramatically helped with the sweating and hot flashes. If I start feeling one coming on, I just eat a small meal and it goes away. I don't see how this could cause me to stop needing to increase my levothyroxine dose

So the only thing I could think of was that maybe my body is having trouble converting T4 to T3? My endocrinologist doesn't ever have me test T3 as he thinks it's unnecessary and I doubt he would see any reason to test certain vitamin levels such as B12 and ferratin. Personally, I don't even see the point in seeing and endocrinologist as all he does is order tests every few months and adjust my dose of levo accordingly, and I can do that on my own. I've asked him repeatedly if there is anything else I can do to have better thyroid health and he says my only 2 options are to keep increasing my levothyroxine dose until my body has destroyed as much of my thyroid as its going to, or get surgery to remove my thyroid so I don't have to continuously increase my levo dose.

So I guess I'm asking, does anyone think I'm on the right track as far as my body not being able to convert t4 to t3 very well? And how do I find an endocrinologist who actually has solutions?

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CraftyGamer19 profile image
CraftyGamer19

I did just realize that I've had my ferritin and B12 tested in the past for other reasons but they were both considered normal.B12: 419 pg/mL (range: 232-1235)

Ferritin: 41 ng/mL (range: 15-77)

These were both tested about a year and a half ago and about 6 months after I started treating hypothyroidism

I've also had problems in the past with what I think are heart palpitations (it feels like my heart skips a beat), and it seems to have gotten worse lately. I think that can be a symptom of B12 deficiency, but it can also be a symptom of hyperthyroidism.

in reply to CraftyGamer19

They can also be a symptom of anaemia and your ferritin was terrible. Less than 30 is considered ferritin deficiency and you were barely above that 18 months ago.

SlowDragon profile image
SlowDragonAdministrator

Just testing TSH and Ft4 is completely inadequate

How much levothyroxine are you currently taking

Do you always get same brand levothyroxine at each prescription

Always taking levothyroxine on empty stomach and then nothing apart from water for at least an hour after

What vitamin supplements are you currently taking

Meanwhile absolutely essential to get FULL thyroid and vitamin testing done

test after 6-8 week on constant unchanging dose and brand levothyroxine

Test early morning and last dose levothyroxine 24 hours before test

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...

If you can get GP to test vitamins then cheapest option for just TSH, FT4 and FT3

£29 (via NHS private service ) and 10% off down to £26.10 if go on thyroid uk for code

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

monitormyhealth.org.uk/

Monitor My Health also now offer thyroid and vitamin testing, plus cholesterol and HBA1C for £65 

monitormyhealth.org.uk/full...

NHS easy postal kit vitamin D test £29 via

vitamindtest.org.uk

Only do private testing early Monday or Tuesday morning. 

Watch out for postal strikes, probably want to pay for guaranteed 24 hours delivery 

For good conversion of Ft4 (levothyroxine) to Ft3 (active hormone) we MUST have optimal vitamin levels

Vitamin D at least over 80nmol…..and between 100-125nmol may be better

Serum B12 at least over 500

Active B12 at least over 70

Folate and ferritin at least half way through range

Extremely common to need to supplement continuously to maintain optimal vitamin levels…..usually vitamin D and vitamin B complex……

What’s your diet like

Are you Vegetarian or vegan

Already on strictly gluten free diet or dairy free diet

As you have Hashimoto’s have you had coeliac blood test done yet. If not get tested BEFORE considering trial on strictly gluten free diet

Approx 85% of Hashimoto’s patients find strictly gluten free diet is beneficial or essential

Approx 70% find dairy free is beneficial or essential

Come back with new post once you get vitamin and full thyroid test results

CraftyGamer19 profile image
CraftyGamer19 in reply to SlowDragon

I am currently taking 75mcg levothryroxine on alternating days with 100mcg. It is not always the same brand as I get whatever generic bran my pharmacy carries. But i do always take it exactly as instructed - on an empty stomach, first thing in the morning, and not eating for an hour.I do not currently take any vitamin supplements because they are usually expensive and I find it difficult to remember to take them since I can't take many of them in the morning with my levothyroxine.

Are you saying that when I test my TSH and T4 that I should do it on the morning before I take my levothyroxine dose? The most recent test was done at around 3pm, whereas I normally test sometime in late morning. Could that be why my tests were weird?

Unfortunately, I live in the US and I do not think there is any way for me to order a test to do at home. I would have to convince either my GP or my endocrinologist to run a more extensive thyroid panel and vitamin levels. But I will try and find some good supplements and see if I feel better with those.

I am currently not on a vegetarian or vegan diet and I never have been. I have already been tested for coeliac disease, which came back negative, but I did try a gluten free diet after that test regardless and I don't believe I noticed any difference, except that I had frequent heart burn.

SlowDragon profile image
SlowDragonAdministrator in reply to CraftyGamer19

Good you’re not vegetarian or vegan…..as patients are frequently extremely low in B12 and iron/ferritin

Come back with new post once you get thyroid and vitamin testing done early morning and last dose levothyroxine 24 hours before test

Testing in USA

stopthethyroidmadness.com/r...

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