My latest labs are bizarre. Any ideas? - Thyroid UK

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My latest labs are bizarre. Any ideas?

10 Replies

I started the year on 25mcg levo, which I'd been stable on since 2015. I quit smoking soon after, and ever since then, I can't get my TSH under control. The closest it's been to normal is a 4.7 about three months back, which was just under the top of the normal range according to my GP's receptionist.

I am now on 75mcg levo, and these are the results from my latest medichecks panel.

TSH 9.75 (0.27 - 4.20)

FT4 18.100 (12.00 - 22.00)

FT3 5.44 (3.10 - 6.80)

The TSH is hypo, but the FT4 and FT3 look fine to me. I think I'd go hyper with another increase. This result is really bizarre to me. Any suggestions, please?

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10 Replies
greygoose profile image
greygoose

Well, you wouldn't 'go hyper' but you would possibly be over-medicated.

Do you take any biotin, either by itself or in a B complex? Because that can skew results.

in reply togreygoose

Not around the time I took the test for at least a week. One of my multivitamin formulas contains it. I think biotin suppresses TSH if I remember correctly, though. Poor choice of words on the 'go hyper', but you get my drift. :)

Maybe it's lab error? I'd expect those levels to result in a TSH nearer the bottom of the normal range.

greygoose profile image
greygoose in reply to

Lab error is always a possibility, yes. I, too, would expect your TSH to be higher.

Biotin can suppress or elevate TSH - or either of the Frees. It just skews the results.

Why are you taking multivits? Dreadful things to take!

in reply togreygoose

I don't take them regularly. Mostly just folate and the occasional iron these days.

Thanks for the advice. :) I'll run another panel when I have the cash. If it's still that odd, I might look for an endo.

greygoose profile image
greygoose in reply to

You're welcome. :)

SlowDragon profile image
SlowDragonAdministrator

Quitting smoking can have effect on thyroid level, especially if you have Hashimoto's (autoimmune thyroid disease) diagnosed by high thyroid antibodies

verywellhealth.com/cigarett...

Testing needs to be more frequent after stopping smoking

For full Thyroid evaluation you need TSH, FT4, TT4, FT3 plus TPO and TG thyroid antibodies and also very important to test vitamin D, folate, ferritin and B12

Low vitamin levels are very common

Private tests are available. Thousands on here forced to do this as NHS often refuses to test FT3 or antibodies or vitamins

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

Medichecks Thyroid plus ultra vitamin or Blue Horizon Thyroid plus eleven are the most popular choice. DIY finger prick test or option to pay extra for private blood draw. Both companies often have money off offers.

All thyroid tests should ideally be done as early as possible in morning and fasting. When on Levothyroxine, don't take in the 24 hours prior to test, delay and take straight after test. This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip, GP will be unaware)

Is this how you did the test?

If antibodies are high this is Hashimoto's, (also known by medics here in UK more commonly as autoimmune thyroid disease).

About 90% of all hypothyroidism in Uk is due to Hashimoto's. Low vitamins are especially common with Hashimoto's. Food intolerances are very common too, especially gluten. So it's important to get TPO and TG thyroid antibodies tested at least once .

Link about thyroid blood tests

thyroiduk.org/tuk/testing/t...

Link about antibodies and Hashimoto's

thyroiduk.org.uk/tuk/about_...

thyroiduk.org.uk/tuk/about_...

in reply toSlowDragon

Thanks, SlowDragon. :)

I love Medichecks. Their thyroid panel that includes the antibodies got me my initial diagnosis back in 2015. I'm positive for both antibodies and had a repeat test a couple of months ago, and they were still raised.

I'm a little low (but not deficient) in folate, so I supplement that, but other vitamins are ok. I'm also heterozygous for DIO2.

I think I'll get a repeat test in a week or so to rule out lab error, and take both results to the GP if they're still wonky. I don't feel hypo, and I'm usually symptomatic if my TSH gets close to the top of the normal range.

SlowDragon profile image
SlowDragonAdministrator in reply to

Best to avoid multivitamins, especially with Hashimoto's

Most contain iodine, best avoided with Hashimoto's

drknews.com/iodine-and-hash...

thyroidpharmacist.com/artic...

Important to retest vitamin levels as you have quit smoking

If low in folate, taking a good quality daily vitamin B complex with folate in rather than folic acid may be more beneficial as it supplements all the B vitamins

chriskresser.com/folate-vs-...

If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 3-5 days before any blood tests, as biotin can falsely affect test results

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

endocrinenews.endocrine.org...

As you have Hashimoto's, Are you on strictly gluten free diet?

in reply toSlowDragon

Thanks, SlowDragon. :)

I really don't take many multivits. I take folate and iron from time to time. My vit levels are pretty good - folate was low end of normal, and I wanted iron in the middle of the range, so those are what I take at the moment. B12 is perfectly smack dab in the middle of the range.

I went to my new GP this morning who gave me an endo referral off the back of those weird results. I might have a nodule on my right side. Really happy I can get it looked at, as I can't seem to get my levels under control.

I have tried a gluten free diet and I didn't feel any better for doing it, unfortunately.

SlowDragon profile image
SlowDragonAdministrator in reply to

Gluten free may not make you feel noticeably better, but it may slowly lower TPO antibodies

Ideally if you did retry gluten free, you would tests antibodies before starting and repeat after 6-9 months strictly gluten free

Many with Hashimoto's find they need B12 and folate at top of range. Many of us supplement regularly with a good quality daily vitamin B complex, one with folate in, not folic acid. This improves all B vitamins. With Hashimoto's we can be low in B1, B5 and B6

thyroidpharmacist.com/artic...

If you are taking vitamin B complex, or any supplements containing biotin, remember to stop these 3-5 days before any blood tests, as biotin can falsely affect test results

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

endocrinenews.endocrine.org...

Absolutely essential to test vitamin D. Many of us need to supplement vitamin D to bring up to around 100nmol.

vitamindcouncil.org/hashimo...

holtorfmed.com/vitamin-d-au...

drgominak.com/sleep/vitamin...

With Hashimoto's we are often low in magnesium too

Links about importance of magnesium and vitamin K2 Mk7 supplements when taking vitamin D

betterbones.com/bone-nutrit...

articles.mercola.com/sites/...

healthy-holistic-living.com...

articles.mercola.com/sites/...

betterbones.com/bone-nutrit...

Only ever add one supplement or make one change at a time, otherwise you can't assess which is helping

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