Free T reference ranges?

Someone on another forum pointed this out to me. My reference range for free T is 60 - 130 pmol/L. He showed me a link that says that free T ranges should be 47 - 244 pg/mL. When I convert that to pmol/L, is comes out 163 - 846pmol/L. Is this correct? Could a lab really have a wrong reference range that they use?

Heres a link that shows what reference ranges should be:

medicine.uiowa.edu/path_hand … t1802.html

If you think a laboratory has used an inappropriate reference range you should contact them/your doctor and enquire further.

I see all kinds of strange reference ranges used, they often greatly differ not just by molecular range, but also within the same molecular range because of equipement callibration.

Your testosterone has appeared to be high according to the pathology of both your free and total testosterone tests and what people, me included have said to you is partly based upon that. If there is some problem then it is certainly important to clarify the situation. That said I have a feeling that this is not an error from the lab…let me know what you find either way.

P.S

My free testosterone had a range of 8.8-27 pg/ml with Quest labs, but that is specific to their equipement and the test itself, your reference range might be specific to the equipement your lab has set up…

I tend to agree with you Hypo. I had the same idea that the reference ranges may be specific to the way each lab does their testing.

I might be clutching at straws here, but can high testosterone have negative effects on libido, even if it is clearly not an estrogen problem? (or at least until further investigation, we think its not an estrogen problem).

A little off topic here but It seems that a lot of those who try TRT, report feeling really good or at least a lot better for a few days with regard to libido, then fall off the wagon. For instance Rockin813’s reaction to TRT was virtually identical to mine. He soured to 1200 or possibly even higher and didnt feel any benefit whatsover, then he quit and on the way back down for about a week, he reported feeling really high libido. I wonder what that means.

There was also another guy who had a similar response…felt good for a brief time, then all of a sudden it was gone.