1,25-dihydroxyvitamin D (Calcitriol)
This test measures 1,25-dihydroxyvitamin D, the biologically active form of vitamin D. It is used to investigate calcium imbalance, kidney disease and...
TRT Monitoring Panel
Recommended
199.00
The TRT Screening Panel assesses testosterone levels and key regulatory hormones. It supports safe and informed testosterone therapy decisions.
Turnaround time
2-3 days
Biomarkers count
46
Same-Day Appointments
UKAS Accredited Labs
Book your test
Under 18? Patients under 18 can only be seen at GB Medlabs and Clinilabs, Monday to Friday only.
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Details about TRT Monitoring Panel
What is the TRT Screening Panel?
The TRT Screening Panel is a comprehensive blood test designed to evaluate whether testosterone replacement therapy (TRT) may be appropriate and safe before treatment begins. It assesses testosterone levels, hormonal regulation, and key health markers that can influence or be affected by testosterone therapy.
This panel evaluates the androgen axis, thyroid function, cardiovascular risk, metabolic health, and organ function to provide a clear baseline before considering TRT.
The panel includes the following biomarkers:
Hormonal markers
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Total Testosterone
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Free Testosterone (calculated)
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Sex Hormone Binding Globulin (SHBG)
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Luteinising Hormone (LH)
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Follicle Stimulating Hormone (FSH)
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Prolactin
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Albumin
Thyroid function
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Thyroid Stimulating Hormone (TSH)
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Free T4
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Free T3
Cardiovascular and metabolic health
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Lipid Profile
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Apolipoprotein B (ApoB)
Blood health
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Full Blood Count (FBC)
Liver function
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Liver Function Tests (LFT)
Kidney function
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Urea & Electrolytes (U&E)
Additional health markers
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Ferritin
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Vitamin D
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Cortisol
Prostate health
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Prostate Specific Antigen (PSA)
Together, these markers provide a detailed overview of hormonal balance and overall health before initiating testosterone therapy.
Why do I need a TRT Screening Panel?
Low testosterone can affect many aspects of health, including energy levels, mood, libido, muscle mass, and metabolic function. However, testosterone therapy should only be considered after a thorough evaluation to ensure that treatment is appropriate and safe.
The TRT Screening Panel helps determine:
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Whether testosterone levels are low
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Whether the cause may be testicular or pituitary
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Whether underlying conditions could affect testosterone levels
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Whether TRT can be started safely
You may benefit from this test if you experience:
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Reduced libido or erectile difficulties
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Persistent fatigue or low energy
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Loss of muscle mass or strength
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Increased body fat
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Mood changes or brain fog
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Poor exercise recovery
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Suspected low testosterone
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Considering testosterone replacement therapy
Benefits of the TRT Screening Panel
Comprehensive testosterone assessment
Measures total and free testosterone alongside SHBG and albumin.
Identifies hormonal causes of low testosterone
LH and FSH help distinguish primary and secondary hypogonadism.
Evaluates thyroid influence on hormones
Thyroid function can significantly affect testosterone levels and symptoms.
Assesses cardiovascular risk before therapy
Lipid profile and ApoB help evaluate heart health.
Establishes a safe treatment baseline
Blood count, liver, and kidney markers help ensure TRT safety.
Screens for prostate health concerns
PSA testing is recommended before initiating TRT in men.
Identifies metabolic and nutritional factors
Ferritin, vitamin D, and cortisol provide additional clinical insight.
Step-by-step – how we offer TRT Screening Panel testing
Clinic-based testing (UK-wide)
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Choose your nearest UK clinic
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Attend your appointment
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Blood samples are collected by a qualified clinician or phlebotomist
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Samples are sent to the laboratory for analysis
Choose your nearest UK clinic
Attend your appointment
Blood samples are collected by a qualified clinician or phlebotomist
Samples are sent to the laboratory for analysis
At-home or hotel testing (+£60)
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A qualified phlebotomist visits your home or hotel
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Blood samples are collected in a comfortable setting
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No clinic visit or travel required
A qualified phlebotomist visits your home or hotel
Blood samples are collected in a comfortable setting
No clinic visit or travel required
Both services are available UK-wide.
Your TRT Screening Panel results explained
Low testosterone with raised LH or FSH
This pattern may suggest primary hypogonadism, where the testes are not producing sufficient testosterone despite appropriate pituitary stimulation.
Further specialist evaluation may be recommended.
Low testosterone with low or normal LH/FSH
This pattern may indicate secondary hypogonadism, where reduced signalling from the pituitary or hypothalamus affects testosterone production.
Lifestyle factors, stress, or medical conditions can contribute.
Normal testosterone with symptoms
Some men may have normal total testosterone but reduced free testosterone due to higher SHBG levels.
This can lead to symptoms despite apparently normal total testosterone values.
How It Works
Simple steps to get your results
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Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
2
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.
3
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.
Frequently Asked Questions
It assesses suitability and need for testosterone therapy.
It reflects biologically active hormone.
Yes, if free testosterone is low.
It provides indirect fertility-related information.
Yes, sleep, stress, and weight strongly influence testosterone.
No, clinical assessment is always required.
They identify the source of testosterone deficiency.
Yes, it affects free testosterone calculation.
Yes, medical guidance is essential.
Before starting or considering testosterone therapy.
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