Testosterone
Testosterone is the main male sex hormone (women also have some). It regulates libido, muscle mass, bones, energy and sperm production. It has a daily rhythm — highest in the morning.
| Rating | Range |
|---|---|
| No rating | Any value nmol/L |
This marker also has 2 age- or sex-specific range sets in the app — the table shows the general one.
Why it matters
Low (M) affects energy/libido; high (F) may suggest PCOS.
If it’s low
Low testosterone (men) presents as fatigue, low libido, poorer erection, loss of muscle and mood. It is often accompanied by obesity and insulin resistance.
If it’s high
High testosterone in men is rare (often external sources/steroids); in women it can accompany PCOS (acne, excess hair growth, irregular cycles).
What to do
Measure in the morning (rhythm). Mildly low in a man often improves with weight loss, sleep, exercise and good metabolic control. Persistently low with symptoms → endocrinologist.
Read together with
SHBG · FSH · Estradiol · Fasting glucose
Part of the guide: Hormones →
Articles about this marker
- Hair loss: which blood tests reveal the cause — and when they do notSymptom → test
- High red blood cell count, hemoglobin and hematocrit: causes and what to checkComplete blood count (CBC)
- Low testosterone in men: symptoms, testing and what the number really meansMale hormones
- Unexplained weight gain: what to really check in your bloodSymptom → test
This content is for information only and is not a substitute for medical advice. Talk to your doctor about your results.
Your number, not the average
Upload your report: we rate your exact value for your age and sex, show the source, and tell you what to do next.