Thyroid Test

[CuriousGuy1]

Hello, I want to get a thyroid test done. I want to be able to test the TSH, TOTAL T4, FREE T4, TOTAL T3, FREE T3, REVERSE T4, REVERSE T3, TgAb and if I have left some out please let me know. I want a FULL test so I just want to know where or how to get this done, If there was a test for testosterone test could you show this too, THANK YOU.

[Marz]

thyroiduk.org

Click onto ABOUT TESTING in the above link to find the Testing Companies ..

[CuriousGuy1 in reply to Marz]

I have checked and I can't seem to get a test with all of these, I can't see any with RT3

[Marz in reply to CuriousGuy1]

You could ring the company for further information ..

[fibrolinda]

You can get this one and get testosterone separately

bluehorizonmedicals.co.uk/t...

[shaws Administrator]

I the following is about RT3 etc and it is by one of TUK Advisers/scientists and an expert on T3:-

" "Dr. Lowe: Some readers will not be familiar with reverse-T3, and I know from experience that many others harbor misconceptions about the molecule. Because of this, I have summarized in the box below what we know about reverse-T3. I've answered your question below the summary.

Conversion of T4 to T3 and Reverse-T3: A Summary

The thyroid gland secretes mostly T4 and very little T3. Most of the T3 that drives cell metabolism is produced by action of the enzyme named 5'-deiodinase, which converts T4 to T3. (We pronounce the "5'-" as "five-prime.")

Without this conversion of T4 to T3, cells have too little T3 to maintain normal metabolism; metabolism then slows down. T3, therefore, is the metabolically active thyroid hormone. For the most part, T4 is metabolically inactive. T4 "drives" metabolism only after the deiodinase enzyme converts it to T3.

Another enzyme called 5-deiodinase continually converts some T4 to reverse-T3. Reverse-T3 does not stimulate metabolism. It is produced as a way to help clear some T4 from the body.

Under normal conditions, cells continually convert about 40% of T4 to T3. They convert about 60% of T4 to reverse-T3. Hour-by-hour, conversion of T4 continues with slight shifts in the percentage of T4 converted to T3 and reverse-T3. Under normal conditions, the body eliminates reverse-T3 rapidly. Other enzymes quickly convert reverse-T3 to T2 and T2 to T1, and the body eliminates these molecules within roughly 24-hours. (The process of deiodination in the body is a bit more complicated than I can explain in this short summary.) The point is that the process of deiodination is dynamic and constantly changing, depending on the body's needs."

toopoopedtoparticipate.com/...

[CuriousGuy1]

I have more knowledge of Reverse T3 now although it is confusing.. Do you personally know much about it and its function.

[greygoose]

There's no such thing as rT4. It just can't happen and wouldn't be necessary anyway. The rT3 test is very expensive and gives you no useful information. It's one of those tests that tells you IF something is wrong, but not WHAT is wrong.

It does not tell you how well you're converting, nor if the hormone is getting into the cells, as some people seem to think. You can tell how well you're converting by comparing FT4 with FT3. But, there is no way you can tell how much is getting into the cells.

High rT3 can be caused by many things, apart from poor conversion. You could have low FT4 and still have high rT3. It could be caused by low ferritin, or high cortisol, by an infection, by low-calorie diets, etc. etc. etc. So,, you'd be better off spending that money on an iron panel, or a 24 hour saliva cortisol test, or something that will actually tell you something about your health.