Thyroid free T4 question

Diagnosed hypo in 2016. Been on Levi since. What would cause my free T4 to go from .9 to 1.6 within a couple of months?

[SlowDragon Administrator]

As per my reply to previous post

You need FULL Thyroid and vitamin testing

Low vitamin levels cause poor conversion of FT4 to FT3, leading to higher FT4 and lower FT3

[Marz]

.. and the FT4 range is ?

[bma4 in reply to Marz]

My lab work says .8 - 1.7. Being you asked, why are there so many different ranges?

[Marz in reply to bma4]

Because they are based on the population local to the lab doing the testing !

So your FT4 has improved which is what you want. Now for the important FT3 test result ?

[bma4 in reply to Marz]

When my free T4 was .9 I was sleeping fine. Now I can’t sleep.

This latest round my dr didn’t test my free t3 even though I asked, but my latest free t3 was 2.8

[Marz in reply to bma4]

.... and the range is ?

[bma4 in reply to Marz]

Sorry. 2.3-4.2

[Marz in reply to bma4]

Too low to relieve symptoms. Every cell in your body has a receptor for T3. So when levels are low there simply is not enough to go around - and things go wrong. A little like trying to spread a teaspoon of butter on a whole loaf of bread - it doesn't work ...

[Hidden in reply to Marz]

Like the illustration!