Hi, I am writing on behalf of a friend and we are trying to work out the above ratio. The numbers are: free T3=3.1 pmol/L and her reverse T3 is 0.40ng/mL. We have tried converting them to the same units, using the ratio calculator on stopthe thyroidmadness.com and many others and each time we get a different answer. I cannot find an authoritative source on how best to do this conversion. Converting to the same units of measurement, using different ones which some ratio calculators seem to allow... any help would be most appreciated.
Thank you
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lk1294
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There was a similar post and thread a few days ago. This article explains why this ratio is simply nonsense maths and not indicative of good or bad thyroid health. tiredthyroid.com/rt3-3.html
I don't read tiredthyroid.com as saying that the ratio is nonsense. It simply points out that the ratio by itself doesn't tell you the whole story. Profile II is a common situation and tiredthyroid.com points out that benefits may be achieved by reducing T4 and increasing T3.
No it's not simply pointing out that the ratio by itself doesn't tell the whole story. It's saying explicitly that "If a low ratio can be from both high or low Free T3, then the ratio is useless, because it can mean two different things; this makes it mathematically invalid." Two entirely different points. It's not arguing that looking at both FT3 and RT3 levels isn't useful, but that the ratio itself is nonsense maths.
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Please help with my test results, esp the Reverse T3 ratio
Elevated Reverse T3 
Help with interpreting reverse T3
T4 T3 ratio
is the T4:T3 ratio in NDT wrong?
