Testosterone Levels Blood Test: Monitor TRT in Washington

What this test is

The Testosterone Maintenance Therapy Panel measures specific hormones and related substances in your blood. These measurements help healthcare providers understand how your body is responding to testosterone treatments.

What it measures

• Total Testosterone — reflects the total amount of testosterone in the blood
• Free Testosterone — reflects the amount of testosterone not bound to proteins and available for use by the body
• Sex Hormone-Binding Globulin (SHBG) — reflects a protein that binds to sex hormones, including testosterone
• Luteinizing Hormone (LH) — reflects a hormone that signals the testes to produce testosterone
• Follicle-Stimulating Hormone (FSH) — reflects a hormone involved in reproductive function
• Estradiol — reflects a form of estrogen that can be produced from testosterone

What the test involves

This test requires a standard blood draw. A healthcare professional will collect a small sample of blood from a vein in your arm.

Why it is often ordered

Clinicians often order this test to evaluate hormone levels in individuals undergoing testosterone replacement therapy. It helps them determine if the current dosage is appropriate and if hormone levels are within a desired range.

Preparation

Please follow the specific preparation instructions provided by the laboratory. This may include fasting or avoiding certain foods or medications before your blood draw.

How results are reported

Your test results will indicate the measured levels of specific substances in your blood. Laboratories provide reference ranges, which are ranges of expected values, and these can vary between different labs.

Before you go

• Specific fasting requirements
• Timing of blood draw relative to TRT dose
• Any medication restrictions