Suppressed TSH

[JBL312]

Based on the above blood test results, the nurse at my health centre has called me in for an appointment tomorrow to talk about the dangers of my suppressed TSH. Has anyone got any advice on how to respond simply, to avoid them reducing my levothyroxine please? I currently take 125mcg 3 days a week and 137.5mcg 4 times a week. I also take 31.5mcg of t3. Many thanks

[Jaydee1507 Administrator]

How did you take this test?

Time of day?

When did you take last dose of Levo & T3 before the test? How much T3?

These are details that will determine of your test is a good picure of average levels or showing false low particularly for FT3.

Your FT4 is only 43% of range, needs to be around 70%.

How do you take your Levo?

Always take Levo on an empty stomach an hour away from food or caffeine containing drinks & other meds. Many people find taking it at bedtime works well for them.

What supplements do you take and what are latest results for vitamins?

You are on a high dose of T3 so your result is surprisingly low at 38% of range.

GPs dont like low or suppressed TSH results. You can use NICE guidelines that state this:

The first paragraph in the NICE (NHS) Thyroid Disease, Assessment and Management guidelines says :

nice.org.uk/guidance/ng145

"Your responsibility”

The recommendations in this guideline represent the view of NICE, arrived at after careful consideration of the evidence available. When exercising their judgement, professionals and practitioners are expected to take this guideline fully into account, alongside the individual needs, preferences and values of their patients or the people using their service. It is not mandatory to apply the recommendations, and the guideline does not override the responsibility to make decisions appropriate to the circumstances of the individual, in consultation with them and their families and carers or guardian. “

nice.org.uk/guidance/ng145

[JBL312 in reply to Jaydee1507]

I took my levo 24 hours before and t3 split into 3 doses, last one 8 hours before. I will take a look at the link you kindly posted. Thank you.

[SlowDragon Administrator]

is your T3 prescribed?

If yes…by GP or endo

Was last dose Levo 24 hours before test

T3 ….day before test split T3 as 2 or 3 smaller doses spread through the day, with last dose approximately 8-12 hours before test

is this how you did your test

[JBL312 in reply to SlowDragon]

The dosing was done as you said and I buy the t3 myself. Before I added on the t3, I felt awful. I could barely function and now I'm relatively well and my energy levels are mostly good.

[SlowDragon Administrator in reply to JBL312]

So as self sourced T3 …..in order to keep your levothyroxine dose from being reduced you will probably need to see endocrinologist

GP is unlikely to agree to suppressed TSH without endocrinologist overseeing

If anything, you might need small dose INCREASE in Levo

[JBL312 in reply to SlowDragon]

I saw an endocrinologist last year when I was on a dose of 125mcg of levothyroxine and they wanted me to reduce to 100mcg to bring my tsh back up. I wasn't happy about this and the gp agreed to let me stay on the 125mcg. They were aware of the self sourced t3, but didn't think of needed it, despite me explaining it felt better on it.

[Jazzw in reply to JBL312]

Ah right.

Then the simple response is, “I take T3–liothyronine. It’s already in my notes. It’s well known to suppress TSH. I discussed this with Dr X last year after seeing the endocrinologist and it was agreed I could stay on 125mcg levothyroxine. I’m well aware of the potential risks of over medication but I’m not over medicated, as my FT4 and FT3 are well within the laboratory reference ranges. I have the capacity to make decisions for myself. I’m really well-informed on this subject.”

And if they try to argue, stick to your guns. Say confidently, “The thing is, TSH isn’t even a thyroid hormone—it’s a signalling hormone to prompt the thyroid to make thyroid hormones and it’s not a reliable marker for those of us who take liothyronine.

Keep your tone matter of fact. Chances are they only know the very basics and your confidence will hopefully cause them to back off.

But in any case, a nurse shouldn’t really be allowed to reduce your dose. I know that’s the way things are now but it doesn’t mean we have to accept it!

[greygoose in reply to Jazzw]

Oh, wonderful reply, Jazzw! I'm keeping this post to refer people to when they ask this same question - as they often do!

[JBL312 in reply to Jazzw]

I'm saying that word for word 😂. Thank you so so much.

[JGBH in reply to Jazzw]

Brilliant Jazzw! Will keep this post too should I need it. Thank you!

[grumpyold in reply to Jazzw]

Brilliant response! Tells 'em exactly where to put their pipes and how to smoke 'em!

[Kowbie in reply to Jazzw]

thanks for that , I know I’m going to need it

[SilverSavvy in reply to Jazzw]

Fantastic reply Jazzw...I'm also keeping it for the next time I get a 'computer says no' call from the duty doc in my practice. Yet another issue with the NHS: even if you get a GP in the know and they are onside with all your treatment, the system will still throw this kind of nonsense up and demand you see whichever GP or nurse is in charge of 'thyroid patients' or just on duty doc that day if the numbers turn red on them.

That said, they are only doing their job and frustrating as it is, there's no point coming across as a screaming harpy and getting oneself described as 'difficult' or, God forbid, 'depressed' or sim, so I really love your polite but firm means of responding. Absolutely textbook. Thanks!

[Blue_Lagoon]

Hi JBL312,

Have you had your pituitary tested? Problems with the pituitary gland may cause a lower TSH. It may be suffering the effects of hypoT or you may have an actual problem with it. You could say that you would like it tested before altering your dose.x

[JBL312 in reply to Blue_Lagoon]

I don't think they've ever tested that. I will mention it. Thank you x

[SilverSavvy in reply to Blue_Lagoon]

I'm interested in this Blue Lagoon...how does one get pituitary tested pls?

[Blue_Lagoon in reply to SilverSavvy]

I think it’s just a blood test, possibly with an injection beforehand, I’m not sure but I think if you asked your endo for pituitary testing they would probably be fine with it.x

[redhead41]

Not sure if this helps but my understanding is that when the body has enough t3 the pituitary senses this and doesn't send the messenger TSH. Hence it gets lower /suppressed and t4 is also quite low again because there is enough t3- the active hormone. Neither your t4 or t3 are actually high enough so a small increase in either but not both, would help any lingering symptoms .

[JBL312 in reply to redhead41]

Thank you

[JBL312 in reply to redhead41]

Yes it does help understand it. Thank you

[tcpace in reply to redhead41]

That's a very interesting comment which leads me to wonder whether the pituitary responds to the amount of thyroid hormone in the blood stream or the amount of T3 in the tissues etc of the body (or both)? As a bit of a dummy when it comes to anatomical workings, I would have thought it would be the former (blood) because how else would the pituitary be able to sense the amount of T4 or T3? Can you or anyone else clarify please?

[Blue_Lagoon in reply to tcpace]

I was under the impression that TSH is produced as a result of the levels of both the T4 and T3 in the blood. And this is just a guess - I think it may play a role in controlling conversion due to the circadian rhythms of TSH, T3 and T4.

[helvella Administrator in reply to tcpace]

The pituitary is thought to respond to the amounts of both T4 and T3 in the blood that reaches it.

It converts the T4 into T3 and then adjusts - more or less adding the T3 from T4 locally converted to the T3 delivered in the blood.

But the precise conversion mechanism is slightly different to other parts of the body.

And the pituitary is ALSO affected by Thyrotropin Releasing Hormone (TRH) delivered from the hypothalamus to the pituitary.

Also any adjustment by the pituitary is not immediate. It doesn't change the TSH level from 10 to 1 the moment enough thyroid hormone is present. Rather, each day it makes a little less TSH until it reaches some sort of balance. Thus it can take some time for TSH to respond fully. And this is a major reason for the argument that adjustments to doses need to be tested after 6 to 8 weeks.

[tattybogle in reply to tcpace]

The pituitary (and hypothalamus )are both directly affected by the levels of T4/T3 in the blood . It is the action of T4 and T3 on thyroid hormone receptors in cells in the pituitary (and hypothalamus) which controls how much TSH is released

So TSH is produced as a result of action of T4/ T3 on cells in pituitary tissue ( and on hypothalamus which produces TRH)

So the pituitary reports on how it ( and the hypothalamus) feels about the levels of T4/T3 acting on it's cells by increasing or reducing the amount of TSH it releases..... but the pituitary has no way of knowing how the cells of the rest of the body feel about that level of thyroid hormone.

TSH only tells us how 'satisfied' the pituitary and hypothalamus are .

healthunlocked.com/thyroidu.... tsh-is-just-the-opinion-of-your-pituitary-about-your-dose-but-your-pituitarys-opinion-is-a-bit-warped-once-you-take-thyroid-hormone.

[fiftyone]

My TSH is very supressed, around 0.005. I take 175mcgs levo a day. My T4 is well above the range, but my T3 is normal. Been like this for many years. No bone problems, no hyper symptoms and feel fine, I impressed on my GP that I feel well on this dose. When I changed surgeries, I impressed on the new doctor that this dose was 'right for me' and these results are normal 'for me'.

[JBL312 in reply to fiftyone]

Yes I've got to try not to be bullied by them.

[SlowDragon Administrator in reply to JBL312]

Free T4 (fT4) 16.3 pmol/L (12 - 22) 43.0%

Free T3 (fT3) 4.5 pmol/L (3.1 - 6.8) 37.8%

Assuming you have enough levothyroxine tablets…..try small increase in dose

I currently take 125mcg 3 days a week and 137.5mcg 4 times a week.

perhaps 137.5mcg 6 days a week and 125mcg one day per week

I also take 31.5mcg of t3.

Which brand?

[Tina_Maria]

Just to add what @fiftyone has posted above, I am also on levothyroxine only and my TSH has been suppressed since I started levothyroxine in 2003. I take 100 mcg levothyroxine only, my T4 is on top of the range or sometimes slightly over and my T3 is around 60% through the reference range. I had numerous discussions with GPs and endos over the years urging me to lower my dose, which I humoured only once, but no longer, as it just made me ill and did sod all to my suppressed TSH. I went back on the original dose and told them that I cannot function on a lower dose and that it is my risk to take.

I monitor my thyroid and vitamin levels myself once a year, I send the results to the GP practice with the comment 'for your information only and no changes needed'. This is the level I can function best, I have the brain capacity for performing scientific work, I do plenty of exercise & strength training, eat a healthy diet and my glucose and cholesterol levels are picture perfect.

You need to stand firm and defend the levels you feel best on (and with T4 and T3 within the reference range you have a very good defence). They may not agree, but at the end of the day it is your decision and risk to take to have the quality of life you need and deserve.