Originally Posted by O.N. 
Q: Do all labs use the same ranges?
A: No. "Labs use different sample populations, testing procedures and equipment," said Kandice Kottke-Marchant, chair of the Pathology and Laboratory Medicine Institute at Cleveland Clinic. More than 20 glucose assays (tests) are available commercially, and they may all give slightly different results"; said Marchant. In addition, "there isn't a one-size-fits-all reference range," Marchant said. Still, if the test is for pregnant women, for example, then pregnant women are used to establish the reference range, and labs are likely to arrive at comparable references ranges.
with percentages i was giving an example and yes they do in some labs show free testosterone as a percentage. take for instance here: http://www.res100.com/wp-content/upl...ts-Res1002.jpg:
As has already been shown there is many different lab ranges from lab to lab for free testosterone.
Here are some examples for you of different lab ranges for "free testosterone":
This test states "free testosterone calculation" pmol/L (260-740)
http://www.res100.com/wp-content/upl...mol-bloods.jpg
Thats a res100 result by the way!
This test is pmol/L (60-130) http://www.aussie*gym*junkies.com/showthread.php?t=8622
I helped this guy come off HRT
Again another "calculated" free testosterone lab range pmol/l (225-725) Another outstanding res100 result of 633pmol/L http://www.res100.com/wp-content/upl...-test-Dean.png
This test is pmol/L (25-120) http://www.res100.com/wp-content/upl.../Photo0098.jpg this blood test was while someone was on steroids at 500mg per week.
This test is pmol/L (25-120) http://www.res100.com/wp-content/upl...scan0008re.jpg this was using res100 with the ultimate stack.
This is another pmol/L (25-120) http://www.res100.com/wp-content/upl...loods00031.jpg
Lastly here is a percentage result http://www.res100.com/wp-content/upl...ts-Res1002.jpg
Here is one of my blood tests after a PCT pmol/L (120-470) again it states "calculated" PoWeR PCT Program
In this test it is pmol/L (25-120) low/normal testosterone level (22 y.o male)
This test is pmol/l (180-450) Low range testosterone?
this lab is pmol/L (43-138) Confused after Endo appointment with T level
This is pmol/L - range (60-130) Low Test Help Advice
Here is some more for you:
On cycle free testosterone -
Free Testosterone: 313.6 pmol/L (25-120) https://www.aussie*gym*junkies.com/s...=10279&page=13
On cycle free testosterone -
Free Testosterone 168.3 pmol/L (43-138)
Also another in same post:
When I was natty;
Free Testosterone: 37 pmol/L (25-120)
http://www.aussie*gym*junkies.com/sh...9&postcount=20
On cycle blood test free testosterone -
Free Testosterone: 3809 (Reference range: 225 - 725 pmol/L
http://www.aussie*gym*junkies.com/sh...&postcount=994
Free Testosterone 392 pmol/L (170-500)
http://www.aussie*gym*junkies.com/sh...51&postcount=1
Calculated FreeTesto 515.39 pmol/L (260-740) http://www.aussie*gym*junkies.com/sh...94&postcount=2
So there certainly is many different lab ranges for pmol/L:
(260-740)
(60-130)
(225-725)
(25-120)
(25-120)
(25-120)
(120-470)
(25-120)
(180-450)
(43-138)
(60-130)
(25-120)
(43-138)
(25-120)
(225 - 725)
(170-500)
(260-740)
