This infographic visually outlines the three primary methods used to measure free testosterone levels: Equilibrium Dialysis, Calculated Free Testosterone, and Direct Free Testosterone Immunoassays. Each option is represented with a blood sample icon and numbered to reflect their comparative utility. Designed to support educational content on hormone health, the image helps readers understand which testosterone testing method may offer the most accurate results based on clinical context. Ideal for blog posts, health articles, and patient education materials about diagnosing low testosterone.