Hi..I'm awaiting my letter from my endo..told him how I felt...what was going on with me...I told him nearer the end of our conversation that I had read about reverse t3 and all the symptoms I've got seem to be pointing to that..He then had a look at my bloods on p.c..which by the way we're taking from my last visit..3 month ago and said my t3 were fine..I think he said 4.5 to 5...so I said those bloods were awhile ago..He agreed..and starting doing tests on my sight and asking me to push his hand away from each side of my head..hunch my shoulders up...asked when I last had a mri scan..and with that sent me to have more bloods taken..im still after a week awaiting the results...in the mean time I had visited my doctor before seeing endo..tell her I felt lousy..she sent me for bloods...a week later phoned me up to your tsh is high..and to reduce my levo 25 mcg to 100 mcg..This will help your symtems. ..I feel that t3 don't exist. .you mention it.and they don't want to know.
T3....does it really exsist : Hi..I'm awaiting my... - Thyroid UK
T3....does it really exsist
croc345
"a week later phoned me up to your tsh is high..and to reduce my levo 25 mcg to 100 mcg."
That's not right. If you have had your dose reduced because of a high TSH then your doctor is utterly stupid and doesn't know what she is doing. When your TSH goes high you need an increase in Levo which will bring it down. When treating Hypothyroidism we need a low TSH and high in range FT4 and FT3.
Post the new results when you have them , make sure you include the reference ranges so they can be interpreted accurately as ranges differ from lab to lab.
Of course T3 exists. T4 (which you are taking in the form of Levo as you are producing enough yourself) is the inactive hormone, some of it is converted to T3 which is the active hormone which every cell in our bodies need. Your doctor seems to be totally unaware of how the thyroid works. Maybe you can educate her:
Have a look at ThyroidUK's main website > About the Thyroid > Hypothyroidism > The Thyroid Gland - An Overview:
thyroiduk.org.uk/tuk/about_...
"The normal thyroid produces a number of different hormones. The main hormones are called thyroxine (T4) and triiodothyronine (T3). The thyroid produces approximately 80% T4 and 20% T3. The thyroid also produces T2 and T1 in very small amounts but their role is not yet well understood.
T4 is generally considered to be a pro-hormone because it is inactive and only becomes active when converted to T3. However, some researchers believe that T4 does, in fact, have a function.
T3 is an active hormone and does all the work of regulating the body's metabolism.
The tissues are unable to use T4, so an enzyme called 5'-deiodinase converts it to T3. This conversion takes place in the body's cells and tissues, mainly in the liver. Problems with the liver can upset/affect the body's conversion of T4 to T3 and can cause problems for the thyroid."
Did you mean increase your levo from 25 mcg to 100 mcg? Or reduce your levo to 25 from 100? The way you've put it doesn't make sense.
Either way, your doctor is wrong to do it. Increases and decreases should be done in 25 mcg at a time, not 75 mcg. That will stress your body too much, and certainly won't help with your symptoms if it's a decrease!
It's not that T3 doesn't exist, it's just that doctors know nothing about it - even endos only have a very vague idea of what it does. And, they all think it's terribly dangerous! Because they're ignorant. 
I was on 125mcg now on 100 mcg. .reduced by 25 mcg...as tsh to high...thanks
croc345,
That is still entirely wrong - if TSH is too high, you need MORE thyroid hormone, not less.
If your doctor cannot understand TSH, you urgently need to see one who might have a clue.
You know, it really would help us understand - and you, too, come to that - if you gave us the actual figures. A high TSH would be anything over, say, 10. A low TSH would be something like 0.2. A suppressed TSH is something like 0.03. So, where was your TSH?
Do you take T4 and t3 together...how long before breakfast ?..Regards Geoff
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