New bloods tests results (done via Thriva), adv... - Thyroid UK

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New bloods tests results (done via Thriva), advice needed!

Acadia0708 profile image
5 Replies

Trying to conceive and to thyroid levels optimal. As of this week I have increased my levothyroxine to 75mg daily. It seems like I'm not converting t4 to t3 very well?

TSH (0.27-4.2)2.18

T4 (66 - 181) 93.5

FT4 (12-22) 19.7

FT3 (3.1-6.8) 4.22

TgAB 614

TPOAb 292

Active B12 (37.5-188) 119

Ferritin (44 - 150) 80.9

Folate (8.83 - 60.8) 45

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Acadia0708
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SeasideSusie profile image
SeasideSusieRemembering

Acadia0708

To know how well you convert T4 to T3, you first need to get your TSH down to 1 (or lower) to give the highest possible FT4, then we can compare FT4 to FT3 from the same blood draw.

Supplementing with selenium l-selenomethionine is said to help with conversion.

Do you have a Vit D result? The nutrient results that you have posted show good levels.

Did you know that you have Hashimoto's?

Acadia0708 profile image
Acadia0708 in reply toSeasideSusie

Thanks you so much! Yes I did test Vit D which is 78.3 (range 50-175). Assuming you meant I need to get TSH to near 1 first.

SeasideSusie profile image
SeasideSusieRemembering in reply toAcadia0708

Yes, I meant TSH near 1, thanks for pointing that out, I'll edit to avoid any confusion. I really shouldn't use my tablet for replies, just use it for reading the forum, it has a mind of it's own!

Your Vit D would be better 100-150nmol, which is the level recommended by the Vit D Council/Vit D Society.

SlowDragon profile image
SlowDragonAdministrator

So you will need to retest 6-8 weeks after increase in dose up to 75mcg

Recommended on here that all thyroid blood tests should ideally be done as early as possible in morning and before eating or drinking anything other than water .

Last dose of Levothyroxine 24 hours prior to blood test. (taking delayed dose immediately after blood draw).

This gives highest TSH, lowest FT4 and most consistent results. (Patient to patient tip, best not mentioned to GP or phlebotomist)

Is this how you do your tests?

Many people find Levothyroxine brands are not interchangeable.

Once you find a brand that suits you, best to make sure to only get that one at each prescription.

Watch out for brand change when dose is increased or at repeat prescription. Many patients do NOT get on well with Teva brand of Levothyroxine. Teva contains mannitol as a filler, which seems to be possible cause of problems. Teva is the only brand that makes 75mcg tablet. So if avoiding Teva for 75mcg dose ask for 25mcg to add to 50mcg or just extra 50mcg tablets to cut in half

Teva and Aristo are the only lactose free tablets

healthunlocked.com/thyroidu...

Teva poll

healthunlocked.com/thyroidu...

No other medication or supplements at same as Levothyroxine, leave at least 2 hour gap. Some like iron, calcium, magnesium, HRT, omeprazole or vitamin D should be four hours away

(Time gap doesn't apply to Vitamin D mouth spray)

academic.oup.com/jcem/artic...

Physicians should: 1) alert patients that preparations may be switched at the pharmacy; 2) encourage patients to ask to remain on the same preparation at every pharmacy refill; and 3) make sure patients understand the need to have their TSH retested and the potential for dosing readjusted every time their LT4 preparation is switched (18).

What vitamin supplements are you currently taking?

Important to test vitamin D

vitamindtest.org.uk

Acadia0708 profile image
Acadia0708 in reply toSlowDragon

Thank you so much! In general this is how I test. I had no idea about Teva, that’s the one I’m taking.

I’m currently taking this prenatal vItamin by Cytoplan plus Omega 3 fish oil, as well as probiotics.

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