Re: rt3 questions

April 22, 2009

If Rt3 is high in range or over range you usually have issues wihtit.

You divide the Free T3 by the RT3. you need 20 or more times as much T3

as RT3 for things to work right.

--

Artistic Grooming- Hurricane WV

April 22, 2009

--- At 02:15 PM 4/22/2009, wrote:

>

>If Rt3 is high in range or over range you usually have issues

>with it. You divide the Free T3 by the RT3. you need 20 or

>more times as much T3 as RT3 for things to work right.

,

I just checked the guidelines from Dr. Holtorf:

The FT3/RT3 minimum target ratio, depending upon measurement units:

FT3 (pg/mL) / RT3 (ng/mL) -- target ratio = 20

FT3 (pg/mL) / RT3 (pg/mL) -- target ratio = 0.019 - [or: 0.020]

This indicates that, when the units are the same (pg/mL), then

there needs to be at least a FT3/RT3 ratio of 0.02, or 1/50.

This means no more than 50 times more RT3 than FT3.

This is because the RT3 test is for " Total-RT3 " (free plus bound),

and the amount of Free-Reverse-T3 contained in the RT3 (Total-RT3) is

much less. How much less, I cannot guess because the half life of

FT3 from supplemental T3 is effectively 36-48 hours, buffered as it

is by TBG, and the half-life of Total-RT3 (including Free-Reverse T3)

is only a few hours -- perhaps 2 or 2.5 hours.

This also indicates that, depending upon an individual's levels of

TBG (thyroid binding globulin -- which [likely] also binds RT3),

that person's level of Free-Reverse-T3 could be different than that

of the " average " person -- causing unpredictability in effect.

Bill

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