Quite frequently it is discussed here why different labs/assays have different reference ranges. Trying to provide some background why the comparison of lab values is pointless without considering the individual method specific reference range. Lets take T3 as an example: Basically two different …

The biggest issue is with free t direct measurement. You can try to explain to the guys here why free t measured is in very different scale than free t calculated.

It would be interesting to better understand how the different methods are actually physically completed by the lab person. Maybe that’s too over our head, I don’t know… but I think it would make people better understand it’s not a simple black and white measurement (like, say, measuring the weight…

These are 2 interesting videos that give an idea of the ECLIA principle and the operation of the instrument [Chemiluminescence Immunoassay Analyzer (CLIA)] [ - YouTube]

Interesting publication comparing the results of 5 blood samples in 65 different labs. Testosterone concentrations of five authentic human serum samples were analyzed by 65 clinical laboratories using 17 analytical systems. The target values ranged from 43.5 ng/dL to 534 ng/dL, simulating concentra…

@johann77 how can we find out the age ranges of the people used to formulate the range for a given test? I was recently told that the total testosterone ranges were based on 18-25 year olds so someone in their 40s should really be in the lower-mid numbers within the range. I’ve searched but can’t …

Different Reference Ranges for Different Methods

Pharma TRT

ncsugrad2002 December 11, 2019, 4:14pm 5

Yep. Above my pay grade.

New to HRT - Prescribed HCG Monotherapy

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