Testosterone Total

Key Aspects of the Total Testosterone Test

• What it Measures: Total testosterone measures all circulating testosterone: that which is bound to proteins (albumin/SHBG) and the free, active hormone.
• When it is Used: Doctors order this test to evaluate symptoms of high or low testosterone, including infertility, decreased sex drive, muscle loss, hair loss, and fatigue.
• Why it Matters: Testosterone regulates sexual development, bone mass, and muscle strength in both men and women.
• Test Preparation: Blood is typically drawn in the early morning (before 10 AM) when levels are highest. Fasting is generally not required, but sometimes requested.

Common Uses & Indications

• In Males: Diagnosis of hypogonadism, erectile dysfunction, or infertility.
• In Females: Diagnosis of PCOS (polycystic ovary syndrome) or hirsutism (excess hair growth) due to high levels.
• Other: Assessment of pituitary dysfunction or monitoring hormone replacement therapy.

Interpreting Results

• Low Results: May indicate pituitary issues, testicular failure, chronic illness, or age-related decline.
• High Results: May indicate tumors, adrenal gland issues, or anabolic steroid use.
• Factors Affecting Results: Medications (steroids, opioids), high-stress levels, and existing health conditions can influence results.