thyroid antibodies - TgAB 431 what does this me... - Thyroid UK

Thyroid UK

142,282 members167,648 posts

thyroid antibodies - TgAB 431 what does this mean?

Nem14 profile image
23 Replies

38 yr old female diagnosed with hypothyroidism (2011), endometriosis (surgery in 2019), pernicious anaemia and PCOS (lower end of spectrum diagnosed 2024).

Had stressful job in 2023 that triggered bunch of health issues. Since Aug 2023 I’ve gone from healthy, physically fit (powerlifting 125kg) to constant fatigue, muscle weakness, rapid weight gain, brain fog, absent periods, dizziness and low libido.

GP has referred for gynaecology specialist and chronic fatigue. However, it all seems to connect to same time as my thyroid meds were doubled and then diagnosis of pernicious anaemia followed.

So recently I had private advanced thyroid test carried out and that’s flagged high level of antibodies TgAB 431. However everything else is normal: TSH 3.15, FT4 19.8, FT3 4.9, TPOAb 14.5, T4 94.

Here for help and advice understanding these results and what to ask GP for in managing things going forward.

Written by
Nem14 profile image
Nem14
To view profiles and participate in discussions please or .
Read more about...
23 Replies
NotElissa profile image
NotElissa

You are hypothyroid because your TSH is too high most people’s is 1 or lower. Also you have high antibodies which means you have autoimmune thyroid disease. In other countries you are treated once your TSH reaches 3 in the UK they wait until your TSH is over 5. Most doctors will wait a further 3 months and then retest your TSH just incase it was a blip.

I would push for treatment because you have high antibodies and you will continue to feel worse. What I don’t understand is why doctors are so reluctant to treat people who obviously have hypothyroidism because Levothyroxine is as cheap as chips. I am not medically trained but I have studied thyroid disease for over 10 years. This was because every doctor I have ever seen has little or no knowledge of what or how to treat thyroid disease. Let us know how you get on with your GP and I hope he/she sees sense.

Nem14 profile image
Nem14 in reply toNotElissa

yes hypothyroid diagnosed 2011. Antibodies are new fact having privately tested due to chronic fatigue and massive health changes since Aug ‘23. My thyroids meds levothyroxine doubled in Feb 24 after a bunch of general testing to try find route of fatigue.

I pushed for B12 to be tested as my dad is hypo with pernicious anaemia…turns out I’m same. GP being generally unhelpful seems happy to just treat fatigue as independent symptom, hence referral to chronic fatigue specialist yet it was the main symptom that flagged all the tests in first place. All seems like it’s connected to and possibly related to nervous system.

Therefore, I did a private advanced thyroid test, done via Thriva as recommended on Thyroid Uk website which came back positive for antibodies. Would love to know my next steps with GP as ideally I’d like endocrinologist referral to test further. All I can say is I know my body and so far I haven’t been wrong when I’ve had further testing. I’m just struggling to make progress with my GP.

NotElissa profile image
NotElissa in reply toNem14

You need an increase in meds to lower your TSH

helvella profile image
helvellaAdministrator

When it comes to autoimmune thyroid disease, such as Hashimoto's, most have raised Thyroid Peroxidase antibodies, some have Thyroglobulin antibodies. Some have only one of those. Some have both.

The biggest problem is that most NHS tests are TPOab only. Hence someone with TGab only is told they do not have autoimmune thyroid disease.

I don't think we have much understanding about why this happens.

I suggest you join the Pernicious Anaemia Society forum:

healthunlocked.com/pasoc

There's quite a number of members in common between here and there.

Nem14 profile image
Nem14 in reply tohelvella

Sorry, I’m likely over simplifying this but I have only just learnt about antibodies must admit I don’t yet understand about antibodies.

If you have autoimmune hypothyroidism does this mean it’s Hashimoto’s regardless of the type of antibody?

helvella profile image
helvellaAdministrator in reply toNem14

No!

But, in the UK, the term Hashimoto's is often avoided and you just get referred to as having autoimmune thyroid disease (AITD).

There is also Ord's disease which is very similar to Hashimoto's but one of the definitions of Hashimoto's is that the person has a stage in which they have a goitre. Whereas in Ord's they do not. (Lots of people seem to play silly games and suggest that some people have a goitre that is so small it gets missed, or ignored.)

And these antibodies can occur in Graves disease, and other issues. Including physical damage to the thyroid. (E.g. a seat-belt rides up in a motor accident, or some surgery.

And levels of antibodies do change over time.

Lots of other antibodies might be involved, but these are the ones where the antigen, what they attach to, is a substance which would normally only occur within the thyroid hence uniquely identifies that thyroid tissue is involved.

Nem14 profile image
Nem14 in reply tohelvella

Gosh! This is helpful but sounds difficult to differentiate.

No goitre means likely orbs or Graves?

I don’t have a goitre (that I can see, I assume you would notice this given thyroid is at front of throat) but have experienced an odd awareness on my swallowing in last year and half. Not sure how else to describe that sensation.

The Thriva tests came back the Dr said antibodies are present in 80% of patients suffering with Hashimoto's. I thought she was implying that’s what was causing the antibodies.

helvella profile image
helvellaAdministrator in reply toNem14

No - Graves can have a goitre as the thyroid can enlarge is it is called on to make more and more thyroid hormone. And hyperthyroidism is the result.

Antibody tests can be useful to check that someone has one or other autoimmune issue but have limited actual use.

Antibodies are part of the disease process but some of the simplistic ideas seem very wrong.

Some time ago I posted this incredibly complicated paper. Far too much for us to get to grips with. (Way beyond me!!!) But it does help to emphasise that the complexity is beyond the ability of most people to grasp. And suggests that some simple ideas are plain wrong - or misguided.

Unraveling the molecular architecture of autoimmune thyroid diseases at spatial resolution

healthunlocked.com/thyroidu...

arTistapple profile image
arTistapple

Your TSH is not “normal”. Its too high for someone actually being treated for hypothyroidism. TSH should be around 1.

What are your thyroid meds? Often after diagnosis doctors keep patients on too low a dose for sometimes very prolonged periods. E.g. in your case if you started on 50mcgs and doubled to 100mcg, this may still be a dose too low for you.

As above helvella asks you to check out the Pernicious Anaemia forum. So many of us have this underlying our Thyroid situation and the symptoms are so similar it can be very confusing.

Nem14 profile image
Nem14

Thank you all for the comments. I have joined the pernicious anaemia forum too…great recommendation.

My meds went from 50mcg to 100mcg as you guessed.

My TSH history (as far back as app shows):

Date Result

13 June 2024 0.17 mIU/L

16 April 2024 1.25 mIU/L

1 February 2024 2.38 mIU/L

18 December 2023 6.17 mIU/L

23 June 2022 3.28 mu/L

8 December 2021 1.05 mu/L

27 May 2021 4.49 mu/L

SlowDragon profile image
SlowDragonAdministrator

TgAB 431.

TSH 3.15,

FT4 19.8,

FT3 4.9,

TPOAb 14.5,

T4 94.

Please add ranges on results

Was test done as recommended ….early morning, ideally just before 9am, only drink water between waking and test and last dose levothyroxine 24 hours before test

How much do you weigh in kilo

Which brand and do you always get same brand

How frequently do you get B12 injection

Have you tested vitamin D, folate, ferritin recently

Exactly what vitamin supplements are you taking

Nem14 profile image
Nem14 in reply toSlowDragon

Yes test was done first thing with only water having fasted for at least 8hrs. Meds were last taken 24hrs prior.

Weight 91kg (usual is 75kg-80kg when powerlifting)

Brand is Teva UK Ltd

I get B12 injection every 3months last was 3rd Jan. Tested levels on NHS 3rd Dec Serum vitamin B12: 696 ng/L Normal range:211 to 911.

Vit D 51 nmol/l within range. Thriva Dr recommended supplementing to 75nmol/l I’ve ordered Better You spray with K2.

Ferritin 119ug/l

Folate tested 3rd dec by NHS this was low at Serum folate: 4.0 ug/L Normal range:Above 5.4. I was advised to add more folate to meals.

Thriva result
SlowDragon profile image
SlowDragonAdministrator in reply toNem14

You may need B12 injections more frequently

3 months is an arbitrary gap

Do you notice feeling worse in month before next injection

If yes, request injection is every 2 months

Folate

As you have B12 injections it’s recommended also to supplement a good quality daily vitamin B complex, one with folate in (not folic acid) may be beneficial.

This can help keep all B vitamins in balance

B complex best taken after breakfast

Igennus B complex popular option. Nice small tablets. Most people only find they need one per day. But a few people find it’s not high enough dose and may need separate methyl folate couple times a week

Post discussing different B complex

healthunlocked.com/thyroidu...

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) Thorne can be difficult to find at reasonable price, should be around £20-£25. iherb.com often have in stock. Or try 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 folate supplement (eg Jarrow methyl folate 400mcg)

Nem14 profile image
Nem14 in reply toSlowDragon

Thanks for the recommendation. When I worked with my powerlifting coach he recommended supplementing with methyl-folate. So I will defo order some.

This is all very interesting as never has anyone flagged how important vitamins are in the function of thyroid…until I came here of course! I feel naïve having just taken my levothyroxine for so long as per Dr’s instructions.

I was told supplements for vit B in tablet form doesn’t work due to pernicious anaemia. Would this be the case for me?

Nem14 profile image
Nem14 in reply toSlowDragon

I did struggle with fatigue in Dec but when Dr tested levels he felt they were acceptable at 696 ng/L given I was approaching the 3 month mark for my repeat jab.

SlowDragon profile image
SlowDragonAdministrator in reply toNem14

Vit D 51 nmol/l within range. Thriva Dr recommended supplementing to 75nmol/l I’ve ordered Better You spray with K2.

Good

GP will often only prescribe to bring vitamin D levels to 50nmol.

Some areas will prescribe to bring levels to 75nmol or even 80nmol

leedsformulary.nhs.uk/docs/...

GP should advise on self supplementing if over 50nmol, but under 75nmol (but they rarely do)

mm.wirral.nhs.uk/document_u...

But improving to around 80nmol or 100nmol by self supplementing may be better

pubmed.ncbi.nlm.nih.gov/218...

vitamindsociety.org/pdf/Vit...

Once you Improve level, very likely you will need on going maintenance dose to keep it there.

Test twice yearly when supplementing

Can test via NHS private testing service

vitamindtest.org.uk

Vitamin D mouth spray by Better You is very effective as it avoids poor gut function.

The version that contains vitamin K2 Mk7 - One spray = 1000iu

Suggest you try 3 sprays per day

It’s trial and error what dose we need, with thyroid issues we frequently need higher dose than average

Web links about taking important cofactors - magnesium and Vit K2-MK7

Magnesium best taken in the afternoon or evening, but must be four hours away from levothyroxine

betterbones.com/bone-nutrit...

medicalnewstoday.com/articl...

livescience.com/61866-magne...

sciencedaily.com/releases/2...

Recipe ideas

bbc.co.uk/food/articles/mag...

Interesting article by Dr Malcolm Kendrick on magnesium

drmalcolmkendrick.org/categ...

Vitamin K2 mk7

betterbones.com/bone-nutrit...

healthline.com/nutrition/vi...

SlowDragon profile image
SlowDragonAdministrator in reply toNem14

What’s the range on Ft4

Is it 12-22 ?

Free T4 (fT4) 19.8 pmol/L (12 - 22)

Ft4 78.0% through range

If this is correct range you don’t have much room yet to increase dose

Improving low vitamin levels should improve conversion rates to increase Ft3 and lower Ft4 as result so that you can get next increase in Levo

Brand is Teva UK Ltd

Are you lactose intolerant and on lactose free diet?

Lactose free brands - currently Vencamil or Teva

Vencamil is lactose free and mannitol free. originally only available as 100mcg only, but 25mcg, 50mcg and 75mcg tablets became available Sept 2024

Prior to March 2023 Vencamil was called Aristo

Vencamil often very well tolerated/best option for many people

How to get Vencamil stocked at your local pharmacy

healthunlocked.com/thyroidu...

Posts discussing Vencamil

healthunlocked.com/thyroidu...

healthunlocked.com/thyroidu....

Teva makes 12.5mcg 25mcg, 50mcg, 75mcg and 100mcg

Many patients do NOT get on well with Teva brand of Levothyroxine.

Teva is lactose free, but contains mannitol as a filler instead of lactose, which seems to be possible cause of problems. Mannitol seems to upset many people, it changes gut biome 

Helpful post about Teva

healthunlocked.com/thyroidu...

Posts that mention Teva

healthunlocked.com/search/p...

Teva poll

healthunlocked.com/thyroidu...

Nem14 profile image
Nem14 in reply toSlowDragon

Yes, I believe with the Thriva tests the range is within the green areas so FT4 would be 12-22.

Thriva result for T3
Nem14 profile image
Nem14 in reply toSlowDragon

As far as I am aware I’m not lactose intolerant.

Nem14 profile image
Nem14 in reply toNem14

I should probably state that I take Metformin off label as prescribed for PCOS symptoms. 500mg twice a day. One with breakfast and one with dinner. I believe this medication is known to deplete B12/folates but again when tested Dr felt the ranges were acceptable or to increase folate in meals

SlowDragon profile image
SlowDragonAdministrator in reply toNem14

Many (most?) people on B12 injections will need a daily vitamin B complex

So will anyone on Metformin

Nem14 profile image
Nem14 in reply toSlowDragon

This is really insightful. Great piece of advice and no harm in trying this to see if improvements are made.

SlowDragon profile image
SlowDragonAdministrator in reply toNem14

Try a different brand of levothyroxine

Preferably Vencamil

Not what you're looking for?

You may also like...

High TgAb! What does it mean?

We have a private thyroid test done once a year for our son who is now 9 years old. We have just...
sisa1975 profile image

Thyroid antibodies

Hello everyone, Just asking for some advice or thoughts as I have the thyroid antibodies but...

Hi all new to this community thyroid antibodies

Thyroid levels in April was TSH 6.5 GP wasn't concerned despite me having a small swelling in my...

TSH and T4 both dropped

Last September my tsh was 2.5 and t4 13 so both in range but was diagnosed B12 and folate...
Badboybob profile image

High thyroglobulin antibodies what does this mean?

Hi everyone I am new to this group and would welcome some advice. I had some tests and the anti-tg...
Gstclair profile image

Moderation team

See all
helvella profile image
helvellaAdministrator
RedApple profile image
RedAppleAdministrator
SlowDragon profile image
SlowDragonAdministrator

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.