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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
What factors could influence total T result?
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<blockquote data-quote="madman" data-source="post: 219935" data-attributes="member: 13851"><p>This has been beaten to death on here it is known to be an inaccurate assay and should not be used/relied upon when testing FT.</p><p></p><p>Hard to say forsure and would have been better if you used the most accurate assay for TT (LC-MS/MS) and FT (Equilibrium Dialysis or Ultrafiltration) when comparing labs.</p><p></p><p></p><p><strong>From my previous reply (post #6):</strong></p><p></p><p><em>*Pushing up your TT is going to drive up your FT further.</em></p><p><em></em></p><p><em>Was blood work done at the same lab using the same assay?</em></p><p></p><p><strong><em>*Even then sounds like you did not use the most accurate assay for TT (LC-MS/MS) otherwise you would have known where your level sat as the analytical measurement range 1.0 ng/dL - 2,000+ ng/dL.</em></strong></p><p><strong></strong></p><p><strong></strong></p><p><strong><u>Method Used for Total Testosterone</u>:</strong></p><p><strong></strong></p><p><strong><em>– Liquid chromatography-tandem mass spectrometry (LC-MS/MS)- No upper or lower limit</em></strong></p><p><strong><em></em></strong></p><p><strong><em>– Analytical sensitivity: 1.0 ng/dL</em></strong></p><p><strong><em></em></strong></p><p><strong><em>– Analytical specificity: no cross-reactivity with other steroid compounds or supplements like biotin/</em></strong></p><p></p><p><em><strong>– Analytical Measurement Range: 1.0 ng/dL to 2,000+ ng/dL</strong></em></p><p></p><p></p><p><strong><em>*Would have been better off comparing labs only if TT/FT were both tested using the same lab/<u>same assays (most accurate)</u>.</em></strong></p><p><strong><em></em></strong></p><p><strong><em>*You most likely used the same lab but doubtful the most accurate assays, especially for FT.</em></strong></p><p></p><p><em><strong>Would pay no attention to your FT unless you had it tested using the most accurate assays such as Equilibrium Dialysis or Ultrafiltration (next best).</strong></em></p></blockquote><p></p>
[QUOTE="madman, post: 219935, member: 13851"] This has been beaten to death on here it is known to be an inaccurate assay and should not be used/relied upon when testing FT. Hard to say forsure and would have been better if you used the most accurate assay for TT (LC-MS/MS) and FT (Equilibrium Dialysis or Ultrafiltration) when comparing labs. [B]From my previous reply (post #6):[/B] [I]*Pushing up your TT is going to drive up your FT further. Was blood work done at the same lab using the same assay?[/I] [B][I]*Even then sounds like you did not use the most accurate assay for TT (LC-MS/MS) otherwise you would have known where your level sat as the analytical measurement range 1.0 ng/dL - 2,000+ ng/dL.[/I] [U]Method Used for Total Testosterone[/U]: [I]– Liquid chromatography-tandem mass spectrometry (LC-MS/MS)- No upper or lower limit – Analytical sensitivity: 1.0 ng/dL – Analytical specificity: no cross-reactivity with other steroid compounds or supplements like biotin/[/I][/B] [I][B]– Analytical Measurement Range: 1.0 ng/dL to 2,000+ ng/dL[/B][/I] [B][I]*Would have been better off comparing labs only if TT/FT were both tested using the same lab/[U]same assays (most accurate)[/U]. *You most likely used the same lab but doubtful the most accurate assays, especially for FT.[/I][/B] [I][B]Would pay no attention to your FT unless you had it tested using the most accurate assays such as Equilibrium Dialysis or Ultrafiltration (next best).[/B][/I] [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
What factors could influence total T result?
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