Male Hormone Test

An eight-biomarker male hormone panel measuring testosterone, free testosterone, SHBG, FSH, LH, oestradiol, prolactin, and albumin. Provides a complete picture of the hypothalamic-pituitary-gonadal axis with results in 24 hours.

Testosterone is the most commonly requested hormone test for men, but interpreting it in isolation misses the complexity of male endocrine regulation. This panel captures the full axis: the pituitary signals (FSH and LH) that drive testicular function, the downstream outputs (total and free testosterone), the binding protein (SHBG) that determines bioavailability, and the feedback markers (oestradiol and prolactin) that can disrupt the system when elevated. Free testosterone — the fraction not bound to SHBG or albumin — is the biologically active form that tissues actually respond to. Two men with identical total testosterone levels may have very different free testosterone depending on SHBG concentration, which is influenced by age, body composition, thyroid function, and liver health. Oestradiol is produced through aromatisation of testosterone and influences body fat distribution, mood, and bone density in men. Prolactin elevation can suppress the entire reproductive axis. Morning appointments are recommended because testosterone follows a pronounced diurnal rhythm, peaking in the early hours and declining through the afternoon. An 8-hour fast is required. Results are delivered within 24 hours through the Randox Health app, with express same-day options at the Great Portland Street clinic.