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Testosterone Replacement, Low T, HCG, & Beyond
Testosterone Basics & Questions
Target T levels & Defy
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<blockquote data-quote="Jason Sypolt" data-source="post: 168434" data-attributes="member: 13328"><p>I can't answer the question about switching testing methodologies, that would be up to Dr. Saya as Medical Director. Patients are also certainly welcome to have a say in their labs and help select one over the other. This happens for example between selecting the LCMS testosterone test or not.</p><p></p><p>Free T used to be extremely important to me when I (over)analyzed every result, but not really anymore. I just used it as an example. Part of the reason is that I just don't have time for that now, but I'm looking at overall balance, not counting every grain of sand.</p><p></p><p>This is really off topic but relates to the Free T test being discussed:</p><p>I would be cautious in some cases in reading results like that if they came from LabCorp because myself, Nelson, and several others have reported to LabCorp what appears to be a random error in what they report back in units for Free T tests such as direct. They ask for examples which are sent and then they don't respond. What happens is that sometimes they will show Free T results saying they are measured in pg/mL, but that looks to be incorrect and the unit of measure should be ng/dL instead. Here are some examples:</p><p></p><p>Example 1:</p><p>Total T: 734 ng/dL</p><p>Free T: 206 pg/mL</p><p></p><p>You can divide pg/mL by 10 to convert to ng/dL. That's 20.6 ng/dL or 2.8% Free to Total and perfectly reasonable.</p><p></p><p>Example 2 (same person, after a small increase in dosage):</p><p>Total T: 929.2 ng/dL</p><p>Free T: 29.6 pg/mL</p><p></p><p>So in example 2, LabCorp is saying that this person had 2.96 ng/dL (if you convert to the same units) Free T, or 0.319% of 929.2 which is pretty much stating that they now have no Free T at all. Free T in Example 2 should have either been reported in ng/dL or the result should have been multiplied by 10. I have gone back to look at my own results and have seen the same random occurrence.</p></blockquote><p></p>
[QUOTE="Jason Sypolt, post: 168434, member: 13328"] I can't answer the question about switching testing methodologies, that would be up to Dr. Saya as Medical Director. Patients are also certainly welcome to have a say in their labs and help select one over the other. This happens for example between selecting the LCMS testosterone test or not. Free T used to be extremely important to me when I (over)analyzed every result, but not really anymore. I just used it as an example. Part of the reason is that I just don't have time for that now, but I'm looking at overall balance, not counting every grain of sand. This is really off topic but relates to the Free T test being discussed: I would be cautious in some cases in reading results like that if they came from LabCorp because myself, Nelson, and several others have reported to LabCorp what appears to be a random error in what they report back in units for Free T tests such as direct. They ask for examples which are sent and then they don't respond. What happens is that sometimes they will show Free T results saying they are measured in pg/mL, but that looks to be incorrect and the unit of measure should be ng/dL instead. Here are some examples: Example 1: Total T: 734 ng/dL Free T: 206 pg/mL You can divide pg/mL by 10 to convert to ng/dL. That's 20.6 ng/dL or 2.8% Free to Total and perfectly reasonable. Example 2 (same person, after a small increase in dosage): Total T: 929.2 ng/dL Free T: 29.6 pg/mL So in example 2, LabCorp is saying that this person had 2.96 ng/dL (if you convert to the same units) Free T, or 0.319% of 929.2 which is pretty much stating that they now have no Free T at all. Free T in Example 2 should have either been reported in ng/dL or the result should have been multiplied by 10. I have gone back to look at my own results and have seen the same random occurrence. [/QUOTE]
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