Immunoassay

* The new upper limit for the Roche assay was 37.8 ng/mL (females) and 22.8 ng/mL (males). The manufacturer-defined limits were 23.3 ng/mL and 15.2 ng/mL, respectively. New intervals for the Siemens assay matched the manufacturer. No cases of clinically significant pathophysiologic prolactin...

David J Handelsman, *Susan R Davis When requesting a blood testosterone test in women itis key to be aware of the limitations of the commercial immunoassays used by most pathology laboratories. Major limitations of reported low blood testosterone concentrations in women must be recognised...

https://etj.bioscientifica.com/view/journals/etj/11/6/ETJ-22-0145.xml Are we having fun yet?

I recently read some discussion by Chris Masterjohn about the effects of biotin on testosterone, b12 and some other levels. Has anyone looked into this? Does it really effect results to a noticeable degree? I've been getting blood work done for 7 years while taking the amount in my multi the...