Synthroid Only/False Positve Hyper TSH Test?

[Guest guest]

When I took synthroid only, I never did feel right but I did have a

few TSH test come back showing that the synthroid alone made me hyper

in my TSH results.

Question 1. Does this mean I was converting some T4 to T3 or was I

just building up the T4 and geetting a false psoitve hyper as a TSH

result due to the build up?

Do some people not convert any T4 to T3?

Question 2. I have some thyroid left after my RAI and I am just

wondering if I need Cytomal only? Could I just be storing all the T4

from the Armour I am now own?

[Guest guest]

Hi,

A low TSH after RAI is often related to your increased levels of TSH receptor

antibodies since they falsely lower TSH levels. Very often, TSH can't be

relied on to accurately monitor your thyroid status.

Your FT4 and FT3 levels are better indicators of your true thyroid status.

Your body needs some freshly converted T3 from T4 so you don't want to take T3

alone even if you do have some thyroid function.

Armour is a good choice since it replaces T4 and T3. Take care, Elaine

[Guest guest]

The TSH test relies on blood levels of T4 and will become suppressed whether

or not you're converting T4 to T3 efficiently. FT4 tests also rely only on

blood levels. Both tests are only indicative of circulating thyroid hormone

levels not what you're using at the cellular level. T4 is converted to T3

at the cellular level.

If you're not taking T3 (which you are by taking Armour) the doctor could

see if you're converting by testing those levels. If you weren't converting

at all, there would be no T3 (and a person wouldn't last very long). If

you're not converting efficiently, the doctor can indirectly decide by

testing FT4, thyroid binding globulin (TBG) which is expensive, plus FT3

(unbound T3) levels. Your body will try to free up as much T4 as possible

so your TBG would be very low if you're converting inefficiently. Or a

rougher, even more indirect, and cheaper way to do it would be to measure

FT4, Total T3 (includes bound and unbound T3) and FT3 levels. The Total T3

level in relation to FT4 and FT3 could give your doctor and estimation where

your TBG levels are.

OK, I'm hoping that made sense. If it doesn't, let me know and I'll try to

be clearer. I'm distracted right now. Gotta run because those babies are

crying.

Take care,

> When I took synthroid only, I never did feel right but I did have a

> few TSH test come back showing that the synthroid alone made me hyper

> in my TSH results.

>

> Question 1. Does this mean I was converting some T4 to T3 or was I

> just building up the T4 and geetting a false psoitve hyper as a TSH

> result due to the build up?

> Do some people not convert any T4 to T3?

>

> Question 2. I have some thyroid left after my RAI and I am just

> wondering if I need Cytomal only? Could I just be storing all the T4

> from the Armour I am now own?