Testosterone Check
This blood test measures testosterone levels to assess hormonal balance in men and women. It is commonly used to investigate symptoms linked to low or high testosterone.
Turnaround time
2 days
Biomarkers count
1
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Details about Testosterone Check
What is the Testosterone Check?
The Testosterone Check is a blood test that measures the level of testosterone circulating in the body. Testosterone is a key sex hormone involved in muscle mass, bone density, energy levels, libido, mood, and reproductive health.
In men, testosterone is primarily produced by the testes and plays a central role in male sexual development and overall vitality. In women, smaller amounts are produced by the ovaries and adrenal glands and are important for energy, mood, and sexual wellbeing.
This test usually measures total testosterone and may be combined with other hormones for a more complete hormonal assessment.
Why do I need a Testosterone Check?
Imbalanced testosterone levels can affect physical health, mental wellbeing, and sexual function. Symptoms may be subtle and often overlap with stress, ageing, or lifestyle factors.
You may benefit from this test if you experience:
- Low energy or persistent fatigue
- Reduced libido or sexual dysfunction
- Erectile dysfunction (men)
- Loss of muscle mass or strength
- Increased body fat
- Mood changes or low motivation
- Fertility concerns
- Irregular periods or excess hair growth (women)
Testing helps determine whether symptoms are hormonally driven and supports further assessment when needed.
Benefits of the test
- Assesses hormonal balance
Provides insight into testosterone status in men and women. - Investigates low energy and fatigue
Helps identify hormonal causes of reduced vitality. - Supports sexual health assessment
Useful for libido and performance concerns. - Relevant for fertility evaluation
Testosterone plays a role in reproductive function. - Monitors age-related hormone changes
Helps assess hormonal decline over time. - Useful for fitness and muscle health
Testosterone influences strength and body composition. - Simple blood-based testing
Requires only a blood sample. - Guides further hormonal testing
Results may indicate need for additional hormone checks.
Step-by-step: How we offer testing
Clinic-based testing (UK-wide)
- Choose your nearest UK clinic
- Attend your appointment
- A clinician draws a blood sample
- Sample is sent to the laboratory
- Results are issued once analysis is complete
Home or hotel visit (+£60, UK-wide)
- Book a mobile phlebotomist
- Blood sample taken at your home or hotel
- No need to attend a clinic
- Sample securely transported to the laboratory
Your results explained
Low testosterone
- Levels below the normal reference range
- UK standard (adult men, morning sample): <8–12 nmol/L
- May be associated with fatigue, low libido, and muscle loss
Normal testosterone
- Levels within the expected range
- UK standard (adult men): ~8–30 nmol/L
- Suggests adequate testosterone production
High testosterone
- Levels above the normal range
- UK standard (adult men): >30 nmol/L
- May be linked to supplementation, medication, or hormonal conditions
Reference ranges differ for women and by age; results should be interpreted in clinical context.
How It Works
Simple steps to get your results
Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.