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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Questions regarding DiscountedLabs.com tests
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<blockquote data-quote="Nelson Vergel" data-source="post: 15514" data-attributes="member: 3"><p>1. Estradiol test: I've been using the "Estradiol, Sensitive" test at privatemdlabs with good accuracy and results. I believe that it's the RIA method, but not 100% sure. I see that the only estradiol test offered at DiscountedLabs.com is the "Estradiol, Ultrasensitive LC/MS/MS" test. Would results from this lab be comparable to the "Estradiol, Sensitive" test I've been using? I.e., can I compare previous levels from the "Estradiol, Sensitive" test with new levels from the "Estradiol, Ultrasensitive" test and still keep an accurate picture of how my E2 levels have changed over time? Is the range to shoot for on the Ultrasensitive test still 20-30? </p><p></p><p>The LC/MS/MS is the more accurate than the RIA based estradiol test as shown by this study:</p><p></p><p></p><p><strong><a href="http://press.endocrine.org/doi/full/10.1210/jc.2012-3861" target="_blank"></a></strong></p><p><strong><a href="http://press.endocrine.org/doi/full/10.1210/jc.2012-3861" target="_blank">Comparisons of Immunoassay and Mass Spectrometry Measurements of Serum Estradiol Levels and Their Influence on Clinical Association Studies in Men</a></strong></p><p><strong></strong></p><p><strong></strong></p><p><strong>"In conclusion, our findings suggest interference in the standard immunoassay-based E2 analyses, possibly by CRP or a CRP-associated factor. Although this interference does not seem to affect association studies between immunoassay E2 levels and skeletal parameters, we propose a reevaluation of previous association studies between immunoassay-based E2 levels and inflammation-related outcomes. In addition, MS-based assays are to be preferred for the quantification of E2 levels in men."</strong></p><p></p><p>2. Testosterone F&T at DiscountedLabs: Is this the testosterone test that can accurately give TT results over 1500, or will it just show up as ">1500"?</p><p></p><p>Over 1500 ng/dL the test becomes inaccurate, so it is expressed as > 1500 ng/dL</p><p></p><p>3. Any chance of a discounted combo package that includes Total Testosterone and Estradiol? These are the two that I, and probably most other guys, order together the most often.</p><p></p><p>DiscountedLabs.com has one of the most affordable Total+Free Testosterone and Ultrasensitive Estradiol tests online. </p><p>We are thinking about coming up with a membership program for frequent users.</p></blockquote><p></p>
[QUOTE="Nelson Vergel, post: 15514, member: 3"] 1. Estradiol test: I've been using the "Estradiol, Sensitive" test at privatemdlabs with good accuracy and results. I believe that it's the RIA method, but not 100% sure. I see that the only estradiol test offered at DiscountedLabs.com is the "Estradiol, Ultrasensitive LC/MS/MS" test. Would results from this lab be comparable to the "Estradiol, Sensitive" test I've been using? I.e., can I compare previous levels from the "Estradiol, Sensitive" test with new levels from the "Estradiol, Ultrasensitive" test and still keep an accurate picture of how my E2 levels have changed over time? Is the range to shoot for on the Ultrasensitive test still 20-30? The LC/MS/MS is the more accurate than the RIA based estradiol test as shown by this study: [B][URL="http://press.endocrine.org/doi/full/10.1210/jc.2012-3861"] Comparisons of Immunoassay and Mass Spectrometry Measurements of Serum Estradiol Levels and Their Influence on Clinical Association Studies in Men[/URL] "In conclusion, our findings suggest interference in the standard immunoassay-based E2 analyses, possibly by CRP or a CRP-associated factor. Although this interference does not seem to affect association studies between immunoassay E2 levels and skeletal parameters, we propose a reevaluation of previous association studies between immunoassay-based E2 levels and inflammation-related outcomes. In addition, MS-based assays are to be preferred for the quantification of E2 levels in men."[/B] 2. Testosterone F&T at DiscountedLabs: Is this the testosterone test that can accurately give TT results over 1500, or will it just show up as ">1500"? Over 1500 ng/dL the test becomes inaccurate, so it is expressed as > 1500 ng/dL 3. Any chance of a discounted combo package that includes Total Testosterone and Estradiol? These are the two that I, and probably most other guys, order together the most often. DiscountedLabs.com has one of the most affordable Total+Free Testosterone and Ultrasensitive Estradiol tests online. We are thinking about coming up with a membership program for frequent users. [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Questions regarding DiscountedLabs.com tests
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