Understanding Your Total Testosterone Results
Testosterone is the primary male sex hormone (androgen), produced mainly by the Leydig cells in the testes (and in smaller amounts by the adrenal glands in both sexes). The total testosterone test measures all testosterone in blood — free testosterone (biologically active, approximately 2–3%), albumin-bound (readily available), and SHBG-bound (tightly bound and inactive). For men, testosterone drives libido, muscle mass, bone density, red cell production, mood, and sperm production. For women, testosterone is produced in smaller amounts and is important for libido, energy, and bone density. Testosterone follows a diurnal (daily) rhythm, peaking between 7–10 AM — testing should always be in the morning.
Fasting required: Do not eat or drink (except water) for 8–12 hours before this test. Morning appointments are recommended.
Normal Reference Ranges
>>>| Parameter | Normal Range | Unit | Note |
|---|---|---|---|
| Men (adult) | 300–1,000 | ng/dL | Morning fasting sample |
| Men (low threshold) | < 300 | ng/dL | Hypogonadism if symptomatic |
| Women (adult) | 15–70 | ng/dL | — |
| Women (high — investigate) | > 80 | ng/dL | PCOS or adrenal source |
Reference ranges may vary slightly between laboratories. Always compare your result to the range printed on your specific lab report.
What High Total Testosterone Results Mean
In men, testosterone above 1,000 ng/dL on a natural (non-supplemented) sample warrants review — endogenous causes include a testosterone-secreting tumour, though this is rare. In men using testosterone replacement therapy (TRT) or anabolic steroids, high values indicate over-dosing and are associated with erythrocytosis (elevated haematocrit and haemoglobin), prostate stimulation, and suppression of natural sperm production. In women, elevated testosterone (above 70–80 ng/dL) is most commonly caused by polycystic ovary syndrome (PCOS) — associated with irregular periods, hirsutism, acne, and infertility. Adrenal tumours and congenital adrenal hyperplasia are less common causes.
What Low Total Testosterone Results Mean
In men, testosterone below 300 ng/dL combined with symptoms of hypogonadism constitutes clinical hypogonadism. Symptoms include reduced libido and erectile dysfunction, fatigue and reduced energy, loss of muscle mass, increased visceral fat, depression and poor concentration, and reduced bone density. Primary hypogonadism (the testes are failing) shows low testosterone with high LH and FSH. Secondary hypogonadism (the pituitary is not stimulating adequately) shows low testosterone with low or inappropriately normal LH and FSH — may indicate a pituitary tumour, opioid use, or significant obesity. In women, low testosterone causes reduced libido and fatigue but rarely warrants treatment.
When to See a Doctor
Men with testosterone below 300 ng/dL and symptoms should see an endocrinologist or urologist. Two morning fasting samples on different days are needed to confirm hypogonadism. If LH and FSH are also low (secondary hypogonadism), pituitary MRI is often warranted to exclude a pituitary tumour. Women with testosterone above 80 ng/dL should have PCOS evaluation (pelvic ultrasound, LH, FSH, prolactin, DHEAS). Adolescent boys with delayed puberty and infertile men undergoing evaluation require specialist assessment.
UAE Health Context
Men's health and testosterone testing is rapidly growing in the UAE, driven by increasing awareness of hypogonadism in middle-aged men and a thriving wellness and hormone optimisation sector in Dubai and Abu Dhabi. The high rates of obesity and metabolic syndrome in the UAE are significant drivers — adipose tissue aromatises testosterone to oestrogen, lowering free testosterone in obese men. Anabolic steroid use among gym-going expats — particularly bodybuilders — is a recognised clinical issue; anabolic steroids suppress the hypothalamic-pituitary-testicular axis, causing secondary hypogonadism that may persist for months to years after cessation. TRT requires an endocrinologist or urologist prescription in the UAE.
What to Do Next
Confirm with two morning fasting samples. Add LH, FSH, and prolactin to distinguish primary from secondary hypogonadism. For men with secondary hypogonadism, pituitary evaluation is essential before starting TRT. For PCOS in women: lifestyle modification (weight loss), hormonal contraception for menstrual regulation, metformin for insulin resistance, and fertility specialist referral if conception is desired. Do not start TRT without specialist assessment — it permanently suppresses natural testosterone production and causes azoospermia.
Related Tests Often Ordered Together
>>>Frequently Asked Questions
What is a normal Total Testosterone level?
Normal Total Testosterone ranges vary by parameter. Men (adult): 300–1,000 ng/dL; Men (low threshold): < 300 ng/dL; Women (adult): 15–70 ng/dL; Women (high — investigate): > 80 ng/dL. Always compare your results against the reference range on your specific lab report, as ranges can vary slightly between laboratories.
What causes high Total Testosterone?
In men, testosterone above 1,000 ng/dL on a natural (non-supplemented) sample warrants review — endogenous causes include a testosterone-secreting tumour, though this is rare. In men using testosterone replacement therapy (TRT) or anabolic steroids, high values indicate over-dosing and are associated with erythrocytosis (elevated haematocrit and haemoglobin), prostate stimulation, and suppression of natural sperm production. In women, elevated testosterone (above 70–80 ng/dL) is most commonly caused by polycystic ovary syndrome (PCOS) — associated with irregular periods, hirsutism, acne, and infertility. Adrenal tumours and congenital adrenal hyperplasia are less common causes.
Do I need to fast before a Total Testosterone test?
Yes, fasting for 8–12 hours is required before this test. You may drink water during the fasting period. Morning appointments (7–10 AM) are recommended so you can fast overnight without disruption.
How often should I get a Total Testosterone test?
As clinically indicated. Men on TRT: every 3–6 months to monitor dose and haematocrit.
Medical Disclaimer: The information on this page is provided for general educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Reference ranges are general guidelines — your doctor will interpret your results in the context of your full clinical picture, symptoms, and medical history. If you have concerns about your test results, always consult a licensed healthcare professional. Do not delay seeking medical advice or disregard professional medical guidance because of information on this page.