Those of you who have conversion problem - Thyroid UK

Thyroid UK

141,246 members166,486 posts

Those of you who have conversion problem

lisan1 profile image
19 Replies

Did you ever feel well on thyroxine only?

Just got my results back today

TSH 0.05 (0.35-5.50)

Ft4 19.4 (10-19.8)

I think doctor wants to reduce meds tomorrow. Plan is to try to get approval of 50/75 alternate days. I still feel ill. But felt good for 3 weeks when I had been on this dose for 1 week. I'm just worried that I have a conversion problem.

Written by
lisan1 profile image
lisan1
To view profiles and participate in discussions please or .
Read more about...
19 Replies
SeasideSusie profile image
SeasideSusieRemembering

lisan1 You'll only know if you have a conversion problem if you have FT4 and FT3 tests done at the same blood draw.

Learner1 profile image
Learner1

Kent Holtorf has a good write-up on thyroid conversion problems. You can Google it.

blondpalomino profile image
blondpalomino in reply toLearner1

Hi Learner 1,

thanks,that's very interesting.

In one of his papers he says that people with inflammatory conditions - including Hashimito's - will have a decreased T4 to T3 conversion,and because of this the TSH will be suppressed,making it an unreliable indicator of normal tissue thyroid levels. So any person with an inflammatory condition will have diminished levels of T3 and effective treatment must include T3. Also a suppressed TSH is not necessarily an indication of excess thyroid treatment.

I will take this to my doctors appointment tomorrow, and see if it helps to get my T3 back!

Learner1 profile image
Learner1 in reply toblondpalomino

Right!

Also, look up what Jeffery Dach MD has to say about suppressed TSH.

For some reason, I can't paste links here, but it should be easy to find.

blondpalomino profile image
blondpalomino in reply toLearner1

Thanks!

lisan1 profile image
lisan1

Thank you for your replies. I have results of all from before diagnose.

TSH 4.26 (0.35-5.50)

Ft3 3.8 (3.5-6.5)

Ft4 11.7 (10-19.8)

Does that help at all?

Ruthi profile image
Ruthi in reply tolisan1

That just looks like too low a dose. Both T4 and T3 are low in range.

The problem here is that TSH is no guide once you are on hormone replacement. FT3 is the only meaningful figure.

Low vitamin D can make you feel rubbish, as well as undermining conversion. You really need the full thyroid panel described above for a complete picture.

lisan1 profile image
lisan1 in reply toRuthi

Thanks, but these were before levo. Before diagnose.

Ruthi profile image
Ruthi in reply tolisan1

Ah! In that case you need to test!

lisan1 profile image
lisan1

The vits are good. But I was supplementing with a multivitamin when they were taken a maybe a bit skewed.

blondpalomino profile image
blondpalomino in reply tolisan1

Hi,

almost all multi vitamins contain iodine,which you shouldn't take if you are on thyroxine, so that may have affected the results.

SlowDragon profile image
SlowDragonAdministrator

You do not appear to have ever had thyroid antibodies checked. There are two sorts TPO Ab and TG Ab. (Thyroid peroxidase and thyroglobulin) Both need checking, if either, or both are high this means autoimmune thyroid - called Hashimoto's, by far the most common cause in UK of being hypo.

TPO is rarely checked and TG almost never checked. More common to have high TPO or high TPO and high TG, but negative TPO and raised TG is possible, though much rarer. There are a few members on here that have this, often they have struggled to get diagnosed.

ALWAYS Make sure you get the actual figures from tests (including ranges - figures in brackets). You are entitled to copies of your own results

If you can not get GP to do these tests, as well as the vitamins (as outlined by @reallyfedup123), then like many of us, you can get them done privately

thyroiduk.org.uk/tuk/testin...

Blue Horizon - Thyroid plus eleven tests all these.

This is a finger prick test you do at home, post back and they email results to you couple of days later. Usual advice on ALL thyroid tests, (home one or on NHS) is to do early in morning, ideally before 9am. No food or drink beforehand (other than water) If you are taking Levo, then don't take it in 24 hours before (take straight after). This way your tests are always consistent, and it will show highest TSH, and as this is mainly all the medics decide dose on, best idea is to keep result as high as possible

If you do have Hashimoto's then you may find adopting 100% gluten free diet may really help reduce symptoms

waveylines profile image
waveylines

You say you still feel ill? What are your symptoms? Tiredness can feature when under and over treated.

Given that you felt good for the first week on the dose increase could possibly point to being over treated for you....though technically your Ft4 is in range -just! Alternating like your planning on suggesting doing could make a difference and worth trying. Good idea. If you think about it 50-75mcg though a standard dose increase is actually a big increase relatively speaking.

As far as conversion is concerned you do really need both ft4 & ft 3 doing,,,,what they call a full thyroid panel. Generally GPs find it difficult to get a Ft3 done as the labsfrequently ignore their requests. You can get them done privately to check this. Blue Horizen do them. Its difficult to tell from your blood test that diagnosed you.

silverfox7 profile image
silverfox7

It will be worth saving up to get the tests done as until you have them all you have no idea what you are dealing with and sadly neither do many doctors. FT3 reading tells us so much more and without it it's not really good to try and second guess.

Glynisrose profile image
Glynisrose

TSH becomes irrelevent when at low levels.

Eddie83 profile image
Eddie83

I never felt well on T4-only. When a GP first put me on thyroxine (when I was really ill with intestinal permeability and crashed nutritionals), I would immediately feel better after starting it, then start feeling very anxious and hyper after maintaining a dose for a while, and have to go off T4 again. This yo-yo effect went on for a long time. After that, I was on T3-only and felt quite well (for me, T3 is a much "smoother" hormone than T4). Now, I am on T3+T4=10+75 mcg daily, and doing well with that. I absolutely need T3 10mcg to keep my FT3 at least 50% up in its range. However, I am running my FT4 ~15% up in range and if I attempt to raise T4 from 75mcg to 100mcg, I soon feel hyper and horrible.

I don't know if my case is unusual. I've heard of people who can raise their FT4 up to range top, tolerate it, and still not be producing enough T3. But, I have never come across a case where the patient's system hates T4 so much, that the patient can only tolerate FT4 low in range. I know there are a few patients who only feel well on T3-only, but I don't know what the underlying biochemical reason is, other than rT3.

lisan1 profile image
lisan1

Thank you all for your advice. My doc agreed to take 50/75 and will do all the bits next bloodtest. How long will I need to be of supplements (b12, folate, vit d, ferritin) before test?

Again, this site is the best for understanding thyroid disorders and getting help from all you lovely people.

Sybilla14 profile image
Sybilla14 in reply tolisan1

Fingers crossed this dose will even things out for you🙂

As regards supplements, b12 takes months to clear from the blood and the advice is that if you are supplementing then the tests are not useful to identify true deficiency, they only show what is in your blood from the supplement. As for d3 and iron, I have previously been advised to not take for a few days and I tend to stop 7-10 days before the blood draw. I read somewhere very recently that folate levels are used up pretty quickly but equally, if you have a high folate containing meal before the test then the results will be skewed, I.e. It will reflect what you ate and not what your levels are on average. I'd suggest stoping the supplement for a few days also.

lisan1 profile image
lisan1 in reply toSybilla14

Thank you so much for your help!

Not what you're looking for?

You may also like...

Conversion problem

Hello everyone, Im 34, Hashimoto for 6 years, january this year I crashed from stress and the...

Do I have a Conversion problem ?

Please see the attached lab results . Ft4 at top of the range but low middle FT3. I don't feel...
whatevs profile image

those of you who might know?

First post as I feel I will not get support from GP Diagnosed overactive March 2006 T.4 12.8 PTh...
53plus profile image

No conversion problem?

Hello. I am male, 38 years old. My symptons are: Low body temperature (always 35.9 celsius at wake...
Lucas22 profile image

Conversion problem

Hello How (and how quickly) can you tell if you have a conversion problem of T4 to T3. I have been...
Daffers123 profile image

Moderation team

See all
PurpleNails profile image
PurpleNailsAdministrator
Jaydee1507 profile image
Jaydee1507Administrator
Buddy195 profile image
Buddy195Administrator

Content on HealthUnlocked does not replace the relationship between you and doctors or other healthcare professionals nor the advice you receive from them.

Never delay seeking advice or dialling emergency services because of something that you have read on HealthUnlocked.