Ratio of T4 to T3 in the Human Body

[Guest guest]

Hoping someone can clear this up for me. I'm read Dr Peatfield's book at the

moment, which is excellent. He states on page 12:

" About 80% of the thyroid output into the bloodstream is in the T4 version;

about 16% as T3 and the remaining 4% made up of T2 and T1. "

This suggests a ratio of about 4:1 of T4 to T3.

HOWEVER, looking in the files section of the forum I found the following:

Yorkshire and the Humber NHS Policy Document Policy Ref: 17/10 (EBC) states:

" Armour Thyroid contains both thyroxine (T4) and tri-iodothyronine (T3)

extracted from the thyroid gland of pigs. One grain, about 60 mg, of desiccated

pig thyroid extract contains about 38mcg of T4 and 9mcg of T3, a ratio of around

4 to 1. The normal concentration of these hormones in the human thyroid is,

however, at a ratio of 14 to 1 "

Who is right? Is it 14:1 or is it 4:1? Or am I comparing tow different things (I

don't think so?)