Blood test results.....comments please - Thyroid UK

Thyroid UK

140,893 members166,006 posts

Blood test results.....comments please

aptucxet profile image
9 Replies

I have hashimotos and underactive thyroid. My latest test results are

TSH .248 (.450 - 4.50)

FT3 2.4 (2.0 - 4.4)

FT4 1.68 (.82 - 1.77)

Past 6 weeks taking 100 mcgs of T4.

With TSH too low and Ft3 not at top of range......planning on reducing T4 to 75 mcgs and adding 12.5 of T3 for the next 6 weeks and then checking blood again. Would like to know if this is a good plan? thank you very much. Blood draws before 9 a m .....no biotin for 4 days prior....no T4 until after the blood draw.

Written by
aptucxet profile image
aptucxet
To view profiles and participate in discussions please or .
Read more about...
9 Replies
Regenallotment profile image
RegenallotmentAmbassador

sounds sensible to me but bear in mind that taking T3 may supress your TSH further so best to consider your symptoms as bloods only tell you so much.

How do you feel?

aptucxet profile image
aptucxet in reply toRegenallotment

Weak, achy muscles.....fatigue, etc. I was hoping that reducing the T4 from 100 to 75 mcgs might keep the TSH from going lower? I do wonder what the issue is with TSH being on the low side......since it is just a substance that tells your thyroid to produce more T4 T3. So complicated!

Regenallotment profile image
RegenallotmentAmbassador in reply toaptucxet

Yeah I hear you. My understanding is that once we are on thyroid replacement the TSH can become an unreliable measure. I will get the laptop out and figure out your % through range and come back to you. My aches and fatigue definitely improved with a small introduction of T3. 🌱

Jefner profile image
Jefner in reply toRegenallotment

I am a little worried now when you say T3 supresses TSH levels. My current TSH is really low now and with the tiny increase I have recently started it's obviously going to knock it down even further?

TSH L0.23 0.27 - 4.20 mIU/L. Really don't understand what having a very low TSH means and is it something to worry about

Regenallotment profile image
RegenallotmentAmbassador in reply toJefner

Ignore TSH then, when you take T3 the TSH becomes suppressed and tells you nothing. Like I said to the OP (original poster) it’s more important to look at symptoms and FT3 and FT4.

Jefner profile image
Jefner in reply toRegenallotment

arr ok thanks, never really understod about that tbh

aptucxet profile image
aptucxet

Thank you I appreciate that very much

Regenallotment profile image
RegenallotmentAmbassador in reply toaptucxet

Here you go

FT4: 1.68 pmol/l (Range 0.82 - 1.77) 90.53%

FT3: 2.4 pmol/l (Range 2 - 4.4) 16.67%

So yes, if it were me I would try a drop in T4 but maybe not a whole 25mcg every day, maybe spread a smaller drop over the week. See how it goes and test again in 6 weeks (although my prescriber prefers 12 weeks between changes).

With adding T3, take care not to add it all at once, start small, maybe 2.5mcg and increase after a few days to another 2.5mcg in the afternoon, then switch to 5 mcg in the morning etc. It can take some getting used to.

aptucxet profile image
aptucxet in reply toRegenallotment

Sounds like good advice......I have T3 .......25 mcg tablets........which I can cut into 4 pieces (the size of tiny crumbs!) .......so can start out with small doses. I would not be able to cut them into smaller pieces, however. Thank you again for doing the mathematics 👍

Not what you're looking for?

You may also like...

Blood test results- comments would be helpful please..

I've just obtained latest blood results after a 6 week increase from 75mcgs to 100 mcgs on Mercury...

More test results

Have had more tests done TSH 0.29, (0.27 - 4.20) FT4 20.59, (12.00 - 22.00) T4 112.8, (59.00 -...
Ann-Simpson profile image

Blood test results

Hi Anyone who could answer a quick question re blood test results ? Dr says TSH is 0 and T4 is...

Blood test results help PLEASE.

I am in a tricky situation. I am a celiac and have For 2 years now. Everything was well until I was...
Ela_peraj profile image

Blood test results

I have Graves' Disease, was diagnosed in April 2022. I started on carbimazole, and by the end of...
BallyHi10 profile image

Moderation team

See all
Jaydee1507 profile image
Jaydee1507Administrator
PurpleNails profile image
PurpleNailsAdministrator
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.