Total testosterone measures both bound and unbound testosterone circulating in the bloodstream.

Diagnostic Value: It helps identify androgen deficiency in men and excess androgen states in women.

Clinical Importance: Key for evaluating sexual dysfunction, infertility, and endocrine disorders.

Symptom Correlation: Low levels may cause decreased energy, mood changes, or muscle loss in men; high levels in women may cause acne, excess hair growth, or menstrual irregularities.

Together with free testosterone and SHBG, total testosterone provides a complete picture of androgen status.