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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Free Testosterone Results, Equilibrium Ultrafiltration vs Calculators
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<blockquote data-quote="FunkOdyssey" data-source="post: 228007" data-attributes="member: 44064"><p>The problem is that we don't know how they are determining their reference ranges, so we can't necessarily assume that the different ranges imply a difference in test performance. Some labs decide to use the range from a reference sample like FHS Gen 3, and I've actually seen the Gen 3 total T range pop up on tests people are posting. These labs will have a high proportion of modern day men falling below the range, well in excess of 2.5%. Meanwhile, some labs generate their own reference range based on their own sample of tests they've performed. That's what I suspect Quest has done.</p><p></p><p>What someone ought to do for the sake of science is have back-to-back free T tests performed by Quest and Labcorp in the same day. I bet they would be nearly identical. I might do this someday.</p></blockquote><p></p>
[QUOTE="FunkOdyssey, post: 228007, member: 44064"] The problem is that we don't know how they are determining their reference ranges, so we can't necessarily assume that the different ranges imply a difference in test performance. Some labs decide to use the range from a reference sample like FHS Gen 3, and I've actually seen the Gen 3 total T range pop up on tests people are posting. These labs will have a high proportion of modern day men falling below the range, well in excess of 2.5%. Meanwhile, some labs generate their own reference range based on their own sample of tests they've performed. That's what I suspect Quest has done. What someone ought to do for the sake of science is have back-to-back free T tests performed by Quest and Labcorp in the same day. I bet they would be nearly identical. I might do this someday. [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Free Testosterone Results, Equilibrium Ultrafiltration vs Calculators
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