Testosterone Total Testosterone
The main male hormone, present in smaller amounts in women too.
Also printed asSerum Testosterone
What it measures
The main male sex hormone, present in far smaller amounts in women.
Drives muscle mass, bone density, red cell production, libido and mood; sleep, body fat and alcohol move it most.
Why it matters for how long you stay well
It falls slowly with age but far faster with poor sleep, excess weight and insulin resistance, which means much of the decline people accept as ageing is actually reversible.
How it shows up in daily life
Running low can show as flat mood, poor recovery from exercise, less drive, and weight settling around the middle.
High and low readings
When it reads high
Usually unremarkable in men; in women it is worth a physician's look.
When it reads low
Low energy, muscle and mood - sleep, weight and alcohol matter more here than any supplement.
What moves it
Daily life
- sleep, which it depends on heavily
- weight around your middle
- strength training
- alcohol
- long-running stress
Medicines known to shift it
- steroids (lower it)
- oral contraceptives (lower the free part)
Listed so a result can be read in context. It is not advice to start, stop or change any medicine; that decision belongs with your physician.
Common questions
What does Total Testosterone measure?
The main male sex hormone, present in far smaller amounts in women. Drives muscle mass, bone density, red cell production, libido and mood; sleep, body fat and alcohol move it most.
What does a high Testosterone result usually mean?
Usually unremarkable in men; in women it is worth a physician's look.
What does a low Testosterone result usually mean?
Low energy, muscle and mood - sleep, weight and alcohol matter more here than any supplement.
What is the usual reference range for Testosterone?
A broad adult reference band is 300–1000 ng/dL. For women the band is 15–70 ng/dL. Labs differ, so read your result against the band printed on your own report.
Educational only, not a diagnosis. A single number means little without your history and the rest of your panel, so discuss your own results with your physician.
Typical adult reference band
- Men
- 300–1000 ng/dL
- Women
- 15–70 ng/dL
Labs differ. The band printed on your own report is the one that applies to your result.
Reported in ng/dL, nmol/L
Ageing relevance
4/5
A strong independent predictor of illness and mortality in large cohorts.
Worth knowing
It follows a daily rhythm and runs highest in the morning, which is why the sample is taken early.
Related reading
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