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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone Basics & Questions
Response from LabCorp About Their Incorrect Unit Usages For Their Free Testosterone - Direct - Test
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<blockquote data-quote="Nelson Vergel" data-source="post: 194732" data-attributes="member: 3"><p>LabCorp reports free testosterone that do not make sense even in their "direct" method that goes along with LC/MS.</p><p>[URL unfurl="true"]https://www.labcorp.com/tests/070195/testosterone-free-direct-with-total-testosterone-lc-ms-ms[/URL]</p><p></p><p>Example:</p><p></p><p>[ATTACH=full]12602[/ATTACH]</p><p></p><p>Free testosterone is around 2% of total testosterone.</p><p></p><p>In this example, Total Testosterone is 435.8 ng/dL</p><p></p><p>Two percent of that is 0.02 x 435.8 nd/dL= 8.72 ng/dL= 87.2 pg/mL (units used for free T)</p><p></p><p>His Free T was reported as 16 pg/mL which is absurd.</p><p></p><p>Here is an example from Quest (for this test <a href="https://www.discountedlabs.com/testosterone-free-bioavailable-and-total-immunoassay" target="_blank">Testosterone, Free, Bioavailable and Total (Upper Limit T 1,500 ng/dL) plus SHBG</a>)</p><p></p><p></p><p>[ATTACH=full]12603[/ATTACH]</p><p></p><p>This is the total Testosterone by LC/MS and free T by dialysis</p><p>[URL unfurl="true"]https://www.discountedlabs.com/testosterone-free-dialysis-and-total-ls-ms-ms[/URL]</p><p>[ATTACH=full]12607[/ATTACH]</p><p></p><p></p><p></p><p>Quest has a reasonable range AND units.</p><p></p><p>I have emailed LabCorp several times about this but they ignore it. Dr Saya has done the same thing.</p></blockquote><p></p>
[QUOTE="Nelson Vergel, post: 194732, member: 3"] LabCorp reports free testosterone that do not make sense even in their "direct" method that goes along with LC/MS. [URL unfurl="true"]https://www.labcorp.com/tests/070195/testosterone-free-direct-with-total-testosterone-lc-ms-ms[/URL] Example: [ATTACH type="full" alt="testosterone labcorp.jpg"]12602[/ATTACH] Free testosterone is around 2% of total testosterone. In this example, Total Testosterone is 435.8 ng/dL Two percent of that is 0.02 x 435.8 nd/dL= 8.72 ng/dL= 87.2 pg/mL (units used for free T) His Free T was reported as 16 pg/mL which is absurd. Here is an example from Quest (for this test [URL='https://www.discountedlabs.com/testosterone-free-bioavailable-and-total-immunoassay']Testosterone, Free, Bioavailable and Total (Upper Limit T 1,500 ng/dL) plus SHBG[/URL]) [ATTACH type="full" alt="Quest testosterone ranges and units.jpg"]12603[/ATTACH] This is the total Testosterone by LC/MS and free T by dialysis [URL unfurl="true"]https://www.discountedlabs.com/testosterone-free-dialysis-and-total-ls-ms-ms[/URL] [ATTACH type="full"]12607[/ATTACH] Quest has a reasonable range AND units. I have emailed LabCorp several times about this but they ignore it. Dr Saya has done the same thing. [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone Basics & Questions
Response from LabCorp About Their Incorrect Unit Usages For Their Free Testosterone - Direct - Test
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