ExcelMale
Menu
Home
What's new
Latest activity
Forums
New posts
Search forums
What's new
New posts
Latest activity
Videos
Lab Tests
Doctor Finder
Buy Books
About Us
Men’s Health Coaching
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Navigation
Install the app
Install
More options
Contact us
Close Menu
Forums
Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Wildly Different E2 Numbers - LabCorp vs. Quest
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="jkozlow3" data-source="post: 125997" data-attributes="member: 20866"><p>I won't bore everybody with details and fluff - the numbers speak for themselves. Bottom line, Quest and LabCorp E2 numbers are nowhere near each other based on recent lab work I had done (Quest numbers were 2x LabCorp numbers). Be careful if you are managing E2 with only a single lab!</p><p></p><p><strong>Pre-TRT</strong></p><p></p><p><u>Quest:</u></p><p>Total T: 254</p><p>E2 (non-sensitive / immunoassay): 26 (range: <= 39)</p><p></p><p></p><p><strong>A couple of months into TRT (tested at trough on E3.5D schedule)</strong></p><p></p><p><u>Quest:</u></p><p>Total T: 719</p><p>E2 (non-sensitive / immunoassay): 39 (range: <= 39)</p><p>E2 (ultrasensitive / LC-MS/MS): 54 (range: < 29) - note: this was HIGHER than the non-sensitive value which is the opposite of what most people report!</p><p></p><p></p><p>At this point, I decided to micro-dose Arimidex by dissolving in vodka. I slowly tweaked my dose and tested every couple of weeks (didn't want to crash my E2) until my Quest E2 was in the mid-20s. This was accomplished with a VERY low dose of Arimidex of ~0.25 mg/week based on my calculation.</p><p></p><p>I realize that the need for Arimidex is controversial and many would say that I didn't need it, but that's not what this thread is about.</p><p></p><p>Last week, I tested E2 at BOTH LabCorp and Quest while on a micro-dose of Arimidex. I order my own lab work via UltaWellness (Quest) and DiscountedLabs (LabCorp). The blood was drawn 15 minutes apart.</p><p></p><p></p><p><strong>October 2018 Results (drawn 15 minutes apart)</strong></p><p></p><p><u>Quest:</u></p><p>E2 (non-sensitive / immunoassay): 24 (range: <= 39)</p><p></p><p><u>LabCorp:</u></p><p>E2 (non-sensitive / immunoassay): 12.3 (range: 7.6 - 42.6)</p><p>E2 (sensitive / LC-MS/MS): 13.7 (range: 8-35)</p><p></p><p></p><p>If the LabCorp results are to be believed, I definitely did not need the Arimidex.</p><p></p><p>I'm guessing the Quest results are off, but I have no way of confirming that. If the Quest results are 2x the LabCorp results, then my starting E2 (LabCorp) likely would have been ~13 before TRT. This makes sense since my pre-TRT T level was ~250. T converts to E2, so it makes sense that my E2 level would have been low before starting TRT (since I had no T) vs. the 26 that Quest claimed pre-TRT.</p><p></p><p>Be careful when using labs from one provider to manage E2! It seems like we're in a really sad state when it comes to E2 testing for men and getting reliable, consistent results. Not just based on my experience, but from the experience some of the other members of this board have posted over the years as well.</p></blockquote><p></p>
[QUOTE="jkozlow3, post: 125997, member: 20866"] I won't bore everybody with details and fluff - the numbers speak for themselves. Bottom line, Quest and LabCorp E2 numbers are nowhere near each other based on recent lab work I had done (Quest numbers were 2x LabCorp numbers). Be careful if you are managing E2 with only a single lab! [B]Pre-TRT[/B] [U]Quest:[/U] Total T: 254 E2 (non-sensitive / immunoassay): 26 (range: <= 39) [B]A couple of months into TRT (tested at trough on E3.5D schedule)[/B] [U]Quest:[/U] Total T: 719 E2 (non-sensitive / immunoassay): 39 (range: <= 39) E2 (ultrasensitive / LC-MS/MS): 54 (range: < 29) - note: this was HIGHER than the non-sensitive value which is the opposite of what most people report! At this point, I decided to micro-dose Arimidex by dissolving in vodka. I slowly tweaked my dose and tested every couple of weeks (didn't want to crash my E2) until my Quest E2 was in the mid-20s. This was accomplished with a VERY low dose of Arimidex of ~0.25 mg/week based on my calculation. I realize that the need for Arimidex is controversial and many would say that I didn't need it, but that's not what this thread is about. Last week, I tested E2 at BOTH LabCorp and Quest while on a micro-dose of Arimidex. I order my own lab work via UltaWellness (Quest) and DiscountedLabs (LabCorp). The blood was drawn 15 minutes apart. [B]October 2018 Results (drawn 15 minutes apart)[/B] [U]Quest:[/U] E2 (non-sensitive / immunoassay): 24 (range: <= 39) [U]LabCorp:[/U] E2 (non-sensitive / immunoassay): 12.3 (range: 7.6 - 42.6) E2 (sensitive / LC-MS/MS): 13.7 (range: 8-35) If the LabCorp results are to be believed, I definitely did not need the Arimidex. I'm guessing the Quest results are off, but I have no way of confirming that. If the Quest results are 2x the LabCorp results, then my starting E2 (LabCorp) likely would have been ~13 before TRT. This makes sense since my pre-TRT T level was ~250. T converts to E2, so it makes sense that my E2 level would have been low before starting TRT (since I had no T) vs. the 26 that Quest claimed pre-TRT. Be careful when using labs from one provider to manage E2! It seems like we're in a really sad state when it comes to E2 testing for men and getting reliable, consistent results. Not just based on my experience, but from the experience some of the other members of this board have posted over the years as well. [/QUOTE]
Insert quotes…
Verification
Post reply
Share this page
Facebook
Twitter
Reddit
Pinterest
Tumblr
WhatsApp
Email
Share
Link
Sponsors
Forums
Testosterone Replacement, Low T, HCG, & Beyond
Blood Test Discussion
Wildly Different E2 Numbers - LabCorp vs. Quest
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top