thing is, much of your "t3" isn't actually created by the thyroid gland; it creates "t4", which is converted to t3 at varying rates by different organs...which have different requirements for t3. So the typical treatment is that they give you synthetic t4, and "assume" that the body has everything it needs. not much is visible in the bloodstream. Looking at the hormone levels alone is like trying to analyze someones finances by looking only at their bank balance.
cemar: testosterone regulates sex drive in women, too, and they also can take it. they just need way less than we do. But some women do take T for "low libido"...kind of controversial. a lot of docs (I suspect) don't want to play w/ fire like that.
