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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone Basics & Questions
Free Testosterone Calculation are there different methods.
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<blockquote data-quote="Esq" data-source="post: 68552" data-attributes="member: 15250"><p>I continue to be confused by this issue. Based on my most recent LabCorp numbers, this calculator results in 11.5 ng/dL free testosterone, equating to 1.63% (quite a bit below the 2% to 3% optimal range I see tossed around a lot). This is calculated from total test at 702 ng/dL, SHBG at 52.5 nmol/L, and albumin at 4.4 g/dL. </p><p>-</p><p>The actual LabCorp results for free test (direct) show 17.5 pg/mL with a reference range of 8.7 - 25.1 pg/mL. </p><p>-</p><p>So, two questions. First, if I convert 17.5 pg/mL to ng/dL, I get 1.75 ng/dL, which is significantly less than the 11.5 ng/dL that comes out of the calculator after inputting total test, albumin, and SHBG. Is this just an issue of LabCorp using weird ranges or something? </p><p>Second, based on the LabCorp ranges, both total and free test are roughly square in the middle of the reference range. However, as noted above, when using the calculator linked here, I get 1.63% free test which seems rather low.</p><p>-</p><p>I'll note that Dr. Saya did not seem concerned with either my SHBG or free test numbers, but I continue to stew on the issue. I'm having a lot of the standard symptoms, but my natural total test is pretty solid. I just continue to wonder if this could be a free test issue, or maybe I'm overthinking it.</p></blockquote><p></p>
[QUOTE="Esq, post: 68552, member: 15250"] I continue to be confused by this issue. Based on my most recent LabCorp numbers, this calculator results in 11.5 ng/dL free testosterone, equating to 1.63% (quite a bit below the 2% to 3% optimal range I see tossed around a lot). This is calculated from total test at 702 ng/dL, SHBG at 52.5 nmol/L, and albumin at 4.4 g/dL. - The actual LabCorp results for free test (direct) show 17.5 pg/mL with a reference range of 8.7 - 25.1 pg/mL. - So, two questions. First, if I convert 17.5 pg/mL to ng/dL, I get 1.75 ng/dL, which is significantly less than the 11.5 ng/dL that comes out of the calculator after inputting total test, albumin, and SHBG. Is this just an issue of LabCorp using weird ranges or something? Second, based on the LabCorp ranges, both total and free test are roughly square in the middle of the reference range. However, as noted above, when using the calculator linked here, I get 1.63% free test which seems rather low. - I'll note that Dr. Saya did not seem concerned with either my SHBG or free test numbers, but I continue to stew on the issue. I'm having a lot of the standard symptoms, but my natural total test is pretty solid. I just continue to wonder if this could be a free test issue, or maybe I'm overthinking it. [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone Basics & Questions
Free Testosterone Calculation are there different methods.
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