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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Quest Diagnostics Ultrasensitive Estradiol Code
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<blockquote data-quote="Dr. John Crisler" data-source="post: 8141" data-attributes="member: 91"><p>The aforementioned thread by Nelson is a great post, emphasizing you MUST run the more sensitive estradiol assay. The standard assay is not valid for adult males, and usually over-estimates the true E concentration. This may lead to inappropriate use of an aromatase inhibitor, to the detriment of the patient.</p><p></p><p>The Quest Ultrasensitive E2 is the preferred LC/MS laboratory methodology. The LabCorp Sensitive Estradiol is an immunoassay, which is inferior, but my clinical experience shows it is usually okay. LabCorp now has a new line of LC/MS assays for the hormonal assays we need; the specific LabCorp codes for you are here:</p><p></p><p> Testosterone, Bioavailable w/ SHBG <strong>#500650</strong> </p><p> DHEA-S <strong>#500161</strong> </p><p> <strong>Estradiol #500108 </strong></p><p><strong>Estrone #500634 </strong></p><p> CBC <strong>#005009 </strong></p><p><strong> </strong>Comprehensive Metabolic Panel <strong>#322000</strong></p><p> FSH and LH <strong>#028480 </strong></p><p><strong> </strong> DHT <strong>#500142</strong> </p><p> Prolactin <strong>#004465 </strong></p><p><strong> </strong>PSA <strong>#010322 </strong></p><p> Progesterone <strong>#500167 </strong></p><p><strong> </strong>Pregnenolone <strong>#140707 </strong></p><p> Ferritin <strong>#004598</strong></p><p> TSH <strong># 004259</strong> </p><p>Free T4 <strong>#501902</strong></p><p> Free T3 <strong>#503600</strong> </p><p>reverseT3 <strong>#070104</strong></p><p> IGF-1 <strong>#010363</strong> </p><p>IGFBP-3 <strong>#140152</strong></p><p> Vitamin D, 25-Hydroxy <strong>#081950</strong></p><p></p><p></p><p>I prefer the Free T4 and Free T3 assays, as they remove the influences of Thyroid Binding Globulin.</p></blockquote><p></p>
[QUOTE="Dr. John Crisler, post: 8141, member: 91"] The aforementioned thread by Nelson is a great post, emphasizing you MUST run the more sensitive estradiol assay. The standard assay is not valid for adult males, and usually over-estimates the true E concentration. This may lead to inappropriate use of an aromatase inhibitor, to the detriment of the patient. The Quest Ultrasensitive E2 is the preferred LC/MS laboratory methodology. The LabCorp Sensitive Estradiol is an immunoassay, which is inferior, but my clinical experience shows it is usually okay. LabCorp now has a new line of LC/MS assays for the hormonal assays we need; the specific LabCorp codes for you are here: Testosterone, Bioavailable w/ SHBG [B]#500650[/B] DHEA-S [B]#500161[/B] [B]Estradiol #500108 Estrone #500634 [/B] CBC [B]#005009 [/B]Comprehensive Metabolic Panel [B]#322000[/B] FSH and LH [B]#028480 [/B] DHT [B]#500142[/B] Prolactin [B]#004465 [/B]PSA [B]#010322 [/B] Progesterone [B]#500167 [/B]Pregnenolone [B]#140707 [/B] Ferritin [B]#004598[/B] TSH [B]# 004259[/B] Free T4 [B]#501902[/B] Free T3 [B]#503600[/B] reverseT3 [B]#070104[/B] IGF-1 [B]#010363[/B] IGFBP-3 [B]#140152[/B] Vitamin D, 25-Hydroxy [B]#081950[/B] I prefer the Free T4 and Free T3 assays, as they remove the influences of Thyroid Binding Globulin. [/QUOTE]
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Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Quest Diagnostics Ultrasensitive Estradiol Code
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