Testosterone.free

ChemistryAlso known as: Testost Free Dial fld-mCncAlso known as: Testost Free Msmt SerPlAlso known as: Testost Free SerPl Calc-mCncpg/mL

Measures unbound testosterone available to body tissues.

Normal Range
0.008 – 0.055 nmol/L
nmol/L
Abnormal Levels
Consult your provider
Specimen Type
Blood

Why This Biomarker Matters

Free testosterone better reflects hormone availability than total testosterone. Abnormal levels may indicate hormonal imbalances requiring treatment to address reproductive, metabolic, or sexual health concerns.

Understanding Your Results

Normal Range

0.008 – 0.055 nmol/L

Overview

Free testosterone is the biologically active form of testosterone that is not bound to carrier proteins in the blood. While total testosterone measures all forms, free testosterone better reflects the hormone available for body tissues. This test helps evaluate hormonal function in both men and women. Low free testosterone in men may cause fatigue, reduced libido, or muscle loss, while elevated levels in women may indicate polycystic ovary syndrome (PCOS) or other hormonal disorders. This test provides detailed hormonal assessment.

Technical Information (LOINC Codes)

Standardized laboratory codes for this biomarker

2991-8Primary
Testosterone Free [Mass/volume] in Serum or Plasma
pg/mL
49042-5
Testosterone Free [Mass/volume] in Serum or Plasma by Detection limit <= 1.0 ng/dL
pg/mL
25987-9
Testosterone Free [Moles/volume] in Serum or Plasma by Radioimmunoassay (RIA)
mmol/L
14914-6
Testosterone Free [Moles/volume] in Serum or Plasma
pmol/L
96559-0
Testosterone Free [Moles/volume] in Serum or Plasma by calculation
pmol/L
17685-9
Testosterone Free [Mass/volume] in Dialysis fluid
ng/dL
70240-7
Testosterone Free [Moles/volume] in Serum or Plasma by Detection limit <= 3.47 pmol/L
pmol/L
103227-5
Testosterone Free [Mass/volume] in Serum or Plasma by Calculation
pg/mL

Available Lab Tests

Order tests that measure this biomarker

Testosterone Total and Free with Sex Hormone Binding Globulin (SHBG) Test

$56.38
Results in 1-2 business days

Total & Free Testosterone

$46.48
Results in 1-2 business days