Free / Total Testosterone

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James

Member
Just got results from my 6 month blood work. Everything looks great, but I can't seem to wrap my mind around something regarding the percentage of free to total test:
Baseline (Quest Lab):
Total: 223 ng/dl (250 - 1,100)
Free: 34.5 pg/ml (35-155)
My percentage of free to total would be about 15%.
Today (LabCorp):
Total: 630 ng/dl (348 - 1,197)
Free: 14.5 pg/ml (7.2 - 21.5)
My percentage of free to total would be about 2%.
At baseline, my % of free to total was way higher (but low when considering the range). Today, my % of free to total is much lower (but in the middle of the normal range). Strictly from a blood standpoint, which is better? Thanks guys.
 
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Bass

New Member
did you test for e2 and SHBG? your free T seem low compare to your total, I am guessing you're binding to one of these two.
 

Mocha

New Member
What's up with the variance in the (Free Test) range?

Baseline (Quest Lab):
Free: 34.5 pg/ml (35-155)

Today (LabCorp):
Free: 14.5 pg/ml (7.2 - 21.5)
 

James

Member
Bass - E2 is the same as it was on the last set of BW, 39 pg/ml (7.6 - 42.6). Sensitive was much lower. SHBG was in the middle of the range.

Mocha - I thought the same thing. I guess different labs (Quest / LabCorp) have different ranges.
 
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