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sofacouch 10-03-2012 05:41 AM

t3 and t4
Is there a free and non-free version of each? Or are all references to t3 and t4, whether or not they say "free" t3 and t4, referring to the free version?

TIA, Martha

lisa789 10-03-2012 05:56 AM

Re: t3 and t4
when it concerns the free version, 'free' somehow will be mentioned. there is also 'total', but you want to have the frees tested.

Hope this helps.

sofacouch 10-03-2012 06:05 AM

Re: t3 and t4
Shoot, I was afraid of that. I was go glad my PCP was ordering all these labs when my TSH was normal that I forgot to ask him specifically for *free* T3 and T4! Will I have to ask him regardless? I supposed sometimes things will show in the total? I read about the T3 and T4 connected to proteins not being available to tissue, but elsewhere by a scientist I read that there's an enzyme that cleaves the hormone from the protein when it's need at a site. Don't know what to think now.


FinnMaid 10-03-2012 10:01 PM

Re: t3 and t4
Total ie. "plain" Ts measure the total amount of hormones (so the amount that's bound to carrier proteins and the free amount), "free" Ts the free ie. the amount that's available for use. So you really want to know the free amount.

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