I went to have a blood test with the GP and as part of it they monitored my thyroid level
They’ve only done TSH and refuse to measure T4 and T3 but they have called saying my TSH aid 0.03 and that they are concerned that this is too low
My question is, is it perfectly normal for TSH to be suppressed on thyroid medication? As when I tested myself via Medichecks, my T4 and T3 were just above range
I want to strike the balance of optimal T4 and T3 but fear my GP will try and reduce the dose based on TSH alone. When it was 7.2 six months ago she was reluctant to treat it, which infuriates me
Written by
Jessica1987
To view profiles and participate in discussions please or .
Absolutely essential to regularly retest vitamins too
Low vitamin levels tend to lower TSH
What vitamin supplements are you currently taking
Remember to stop taking any supplements that contain biotin a week before ALL BLOOD TESTS as biotin can falsely affect test results
For full Thyroid evaluation you need TSH, FT4 and FT3 plus both TPO and TG thyroid antibodies tested. Also EXTREMELY important to test vitamin D, folate, ferritin and B12
Low vitamin levels are extremely common, as you have Hashimoto’s
Ask GP to test vitamin levels or include in private testing
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)
Is this how you do your tests?
Private tests are available as NHS currently rarely tests Ft3 or thyroid antibodies or all relevant vitamins
I should also add that I went in for a different blood test, but they ended up measuring my thyroid m. As I was unaware that I was being tested, I took my normal thyroid dose about an hour before which will have suppressed TSH even more I’m sure
If they measured Ft4 but unfortunately they’re going to give me their advice based on TSH only (and after I took a dose of Levo as I wasn’t expecting the test)
TSH is not a thyroid hormone and I think many doctors are unaware of this fact. TSH is from the pituitary gland and rises as the thyroid gland is struggling..
They should concentrate more on a Free T3 and Free T4 result which are rarely tested.
No just levothyroxine - and as they surprised me by measuring TSH (I actually wanted another thing measured in my blood as part of a fertility check up) I took my dose as normal before the blood test
Can you ask for FT3 and FT4 to be tested because your TSH is below the NHS range? I’m having a similar problem- TSH of 0.09, nothing else tested and on 75mcg Levo only. I’m having a retest tomorrow- told them I forgot to stop my B complex a week before and it may have messed up the test. That’s not true but it’s got me another test. They might just retest TSH, though! If so I’ll get a private test.I had the same question as you - what does it mean to have very low TSH when only taking Levo? I know T4 and T3 are more important but the TSH must mean something.
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.
Suppressed TSH
Suppressed TSH - thoughts? 
Suppressed TSH confusion (heart disease, osteoporosis)
Suppressed TSH again!
Suppressed TSH
