Best time of day to take thyroid tests?

[leahcim]

So privately I'm doing an at home blood test for

Tsh

F t3

F t4

T4

Thyroid antibodies

Ferritin

Folate

Vitamin b12 serum

What time of the day will give me the best picture? Like say for example my thyroid is struggling. Which time of the day would show it the most?

[Gravata_Bblu]

I'm not an expert, but look at this

thyroid.about.com/od/gettes...

[jacrjacr]

First thing in the morning like 8am preferably just water before test and no meds.

[Noods]

Hi there, I was just wondering who you have gone with for your blood test?

It seems to be a bit of a mine field.

[Clutter in reply to Noods]

Noods, thyroiduk.org.uk/tuk/testin...

[leahcim in reply to Noods]

Check clutters link home blood tests are in with blue horizons and they also do testing at the spire hospitals etc so I knew they was legit. Iv done a few home tests and everything's gone perfect and their the best prices I could find. Also you can pay with PayPal if your worried about card details etc

[Noods in reply to leahcim]

Thanks so much.

[lizzy321 in reply to leahcim]

is there anyway of testing overactive thyroid with online tests x

[Aliblue]

Fasting blood test - First thing in the morning

[bossbird]

early morning

[Heloise]

I haven't looked at the links but don't take your ordinary dose for 24 hours until after the blood is drawn.

[leahcim]

Thank you everyone. I wasn't sure if maybe it was best to do later on in the day once uv put some stress on the thyroid or something like that. Thanks again all

[LAHs]

If you are on T4 only (e.g. Levo) then early in the morning (before lunch is OK) but don't take your meds until after your test.

If you are on NDT I do not know because T3 has a half life of about 8 hours (as far as I can tell). If you test early before meds on NDT your T3 will be at it's lowest point. Actually I am just about to get my doctor's answer on this question (ie. the NDT case) and I will post her answer.

As far as I know it's OK to eat, the test doesn't have to be on an empty stomach but it should be before you take your meds.

Just FYI T4 has a half life of 7 days, so T4 is easy to measure - just don't take a pill before the test.