Testosterone, Total, LC/MS and Free (Equilibrium Ultrafiltration)
This panel includes total testosterone measured by the most accurate method (liquid chromatography/mass spectrometry), free testosterone percent by equilibrium ultrafiltration, and free testosterone calculated from percent free T.
This panel includes total testosterone measured by the most accurate method (liquid chromatography/mass spectrometry LC/MS), free testosterone percent by equilibrium ultrafiltration, and free testosterone calculated from percent free T. It is adequate for men who expect high T levels and women (LC/MS is accurate for low T levels also).
Total Testosterone:
– Liquid chromatography tandem mass spectrometry (LC/MS/MS)
– Analytical sensitivity: 1.0 ng/dL
– Analytical specificity: no cross-reactivity with other steroid compounds
– Analytical Measurement Range: 1.0 ng/dL to 2,000 ng/dL
Free and Total Testosterone:
– Percent free: equilibrium dialysis/ultrafiltration
– Free: calculated based on total and percent free testosterone
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Suggested Reading: Testosterone Replacement Blood Test Targets
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