Testosterone (T)

Testosterone is the primary male sex hormone, but it plays a vital role in women too. This blood test measures the total amount of testosterone circulating in your bloodstream, offering a clear window into your hormonal health. It is a key investigation for anyone experiencing symptoms of hormonal imbalance, such as persistent fatigue, low mood, reduced libido, erectile dysfunction, or unexplained fertility difficulties. In women, it is used to investigate irregular periods, acne, and excessive hair growth, which can point towards conditions like polycystic ovary syndrome (PCOS).

What this test measures

• Total testosterone (T): This is the total amount of the hormone in your blood, comprising both the protein-bound and free (active) fractions. It is the standard first-line measurement for assessing androgen status.

Why it matters

Testosterone is not just about sex drive. It influences mood, energy levels, muscle mass, bone density, and red blood cell production. An imbalance can have wide-ranging effects on your daily wellbeing and long-term health. Whether you are investigating fertility concerns, symptoms of low energy, or signs of excess androgens, this test provides the essential baseline data. Identifying an abnormal level is the first step towards understanding the root cause and discussing appropriate next steps with your doctor.