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Help interpreting my T4 ranges

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Thyroid Disorders
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Red_34
Forum Moderator
Joined : Apr 2004
Posts : 23581
Posted 11/3/2014 10:32 AM (GMT -6)
Hello all :)

I'm thinking these levels look good but I'm not sure. I don't see my primary for a few months so I thought I would ask if these levels are good or no?

Free T4 0.79 (0.58-1.64 ng/dl)
TSH 0.71 (0.34-5.60 uIU/ml)

Thanks for any help.
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jujub
Elite Member
Joined : Mar 2003
Posts : 10422
Posted 11/3/2014 11:06 AM (GMT -6)
Those are in the normal range, and most people won't have symptoms with those levels. Are you feeling okay? Your levels should be rechecked every three months until you have been stable within range for at least a year.
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Red_34
Forum Moderator
Joined : Apr 2004
Posts : 23581
Posted 11/3/2014 11:31 AM (GMT -6)
Thanks Judy. Yes, I'm feeling ok'ish...it was my weight gain that is what was troubling me. Since I have a thyroid cyst, I get my levels checked every 3 months anyway.
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cfs
Regular Member
Joined : Aug 2011
Posts : 80
Posted 11/3/2014 7:08 PM (GMT -6)
Do you ever get your T3 tested?
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Red_34
Forum Moderator
Joined : Apr 2004
Posts : 23581
Posted 11/4/2014 8:13 AM (GMT -6)
Not that I'm aware of.
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hypoHashimoto
Veteran Member
Joined : Jul 2012
Posts : 786
Posted 11/5/2014 6:14 AM (GMT -6)
FT3 is generally tested with hyper, and your TSH is a little low, so I would recommend testing for FT3 next time you go for blood tests !
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Red_34
Forum Moderator
Joined : Apr 2004
Posts : 23581
Posted 11/5/2014 11:00 PM (GMT -6)
I thought according to the test results that my TSH was a little on the low side but I know absolutely NOTHING about ranges. So when I got the letter from my primary that said everything was normal (just got the letter yesterday) that everything is fine?

I've read about all the levels online but honestly it's all jibberish to me. What is important about the T3 test? Can you put it in thyroid tests for dummies version :)
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jujub
Elite Member
Joined : Mar 2003
Posts : 10422
Posted 11/5/2014 11:43 PM (GMT -6)
Basically, T4 is the precursor to T3 and is produced in larger amounts by your body. When your body senses the circulating T3 is low, it starts converting T4 to T3, which is what actually is active in your body. It's possible to have a normal T4 but low T3 if your body doesn't make that conversion efficiently. It's somewhat like a car with plenty of gas, but no spark plugs to fire it. This is most likely if you're hyperthyroid.

If you haven't checked Medline, here is their page:

www.nlm.nih.gov/medlineplus/ency/article/003687.htm
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Red_34
Forum Moderator
Joined : Apr 2004
Posts : 23581
Posted 11/6/2014 10:27 AM (GMT -6)
Wow, I just looked up Hyperhtyroidism and except with the weight gain instead of loss, I have almost all of those symptoms. Especially the hand shakes, heat intolerance, itchy skin and sweating.
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hypoHashimoto
Veteran Member
Joined : Jul 2012
Posts : 786
Posted 11/6/2014 10:39 AM (GMT -6)
Hi,
Some people develop same symptoms for both hyper and hypo, it would be clever to test for thyroid antibodies to see if you have an autoimmune disease that is causing your TSH to be a little bit low, those are TPOab, TGab and TSIab.
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