free t direct

Hey Folks, thought I would update the graph for free T reference ranges based on LC-MS/MS+ED and compare with Labcorp's direct RIA fT reference range. What the hell do you do with with your direct fT measurement if you want to compare with equibrium dialysis reference ranges? Take the Labcorp...

I've been having Labcorp's free direct test all along and it seemed pretty on par with SHBG and Total T. Results were pretty consistent at and just a bit over "normal range, and in agreement with TruT calculator. However, I currently have a unique situation. I have leukemia, and from that...