Introduction
Testosterone is a crucial hormone that regulates many aspects of male health, including sexual function, energy levels, muscle mass, and mood. Total testosterone measures the combined bound and free testosterone in the bloodstream, while free testosterone reflects the bioavailable portion not bound to proteins. At Crossroads Urology, we perform both tests to provide a comprehensive evaluation of male hormonal health.
Purpose
The Testosterone (Free and Total) test is used to:
- Diagnose low testosterone (hypogonadism) and related symptoms.
- Evaluate male infertility by assessing hormonal contributions to sperm production.
- Investigate symptoms such as low libido, fatigue, erectile dysfunction, or reduced muscle mass.
- Monitor testosterone levels during testosterone replacement therapy (TRT).
Procedure
- A blood sample is drawn from a vein in the arm.
- The sample is sent to the lab to measure:
- Total Testosterone: Includes testosterone bound to proteins (SHBG and albumin) and free testosterone.
- Free Testosterone: Bioavailable testosterone that is not protein-bound.
- Results are typically available within 1-2 days.
Preparation
- Testosterone levels fluctuate throughout the day; morning testing (before 10 a.m.) is recommended for the most accurate results.
- Fasting may be required depending on laboratory protocols.
- Inform the provider about any medications or supplements, as some can impact testosterone levels.
Risks and Considerations
- Testing is generally safe, with minimal risks associated with blood draws, such as bruising or discomfort.
- Testosterone levels can vary based on factors such as age, stress, illness, or recent activity.
At Crossroads Urology, we interpret testosterone results in the context of the patient’s symptoms and health history to provide an accurate diagnosis.
Results
- Normal Total Testosterone Levels: Generally range from 300-1,000 ng/dL, but specific ranges may vary by laboratory.
- Free Testosterone: Represents 1-2% of total testosterone, often reported in pg/mL.
- Low levels may indicate hypogonadism, while elevated levels can be associated with certain medical conditions or testosterone therapy.
Conclusion
Testing testosterone (free and total) is essential for diagnosing and managing male hormonal imbalances. At Crossroads Urology, we combine expert care with advanced diagnostics to create personalized treatment plans that improve quality of life. Contact us today to learn more about testosterone testing and schedule your evaluation.
