How common is Low-T?
Low testosterone affects 1 in 4 men over 30, and up to 40% of men over 45.2 It’s more common than you might think, yet 90% of men in the UK go untreated.2
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96% of men with TD restore their testosterone levels to normal within 3 months¹
1:1 support from TRT doctors
Comprehensive health check (45 biomarkers)
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Millions of men experience low testosterone, but there's an effective solution: TRT. Numan offers treatments to help you feel and perform at your best.
How common is Low-T?
Low testosterone affects 1 in 4 men over 30, and up to 40% of men over 45.2 It’s more common than you might think, yet 90% of men in the UK go untreated.2
What is TRT?
Testosterone replacement therapy (TRT) is a treatment that works by supplementing your body with testosterone to restore healthy testosterone levels, enhancing energy, mood, and strength, while boosting sex drive and overall wellbeing.3
Am I eligible for TRT?
Starting TRT begins with a blood test to check your hormone levels. If you have low testosterone, our specialists will create you a personalised treatment plan.
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We provide holistic treatment programmes that incorporate medication, supplementation, lifestyle advice, clinical support, and ongoing testing.
All testosterone treatment programmes include:
Effective medication
24/7 access to our expert clinical team
Regular monitoring blood tests
Symptom tracking
Personal patient support manager
Lifestyle advice
Our venous blood test accurately measures your total and free testosterone levels, along with 40+ additional markers to get a comprehensive picture of your health.
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If your test shows results of low testosterone, chat one-on-one with a men’s health expert. We’ll talk through your symptoms, review your blood test results, and help you decide if testosterone treatment is the right next step.
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Our treatment options include pills, injections, and gels, with dosing tailored to your needs and backed by ongoing expert care and monitoring.
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From improved energy and mood in the early weeks to better sexual function and body composition over the following months, here’s what you can expect as your treatment takes effect and your testosterone levels increase.8
Higher libido
Stronger erections
Improved mood and energy
Improvement in inflammation markers
Early fat loss and muscle gain
Higher strength and endurance
Improved cardiovascular health
Reduced risk of type of 2 diabetes
Further fat loss
Higher bone density
Improved cognition
Faster recovery
Ongoing reduction in visceral fat
Our expert team provides comprehensive testing, lifestyle evaluations, testosterone treatments, and dedicated support to help revitalise your health.
Dr Dimitris Schizas
Numan Doctor
MBBS MRCGP MSC BSSM

Dr Michael Lacey
Numan Doctor
MBChB BSc (Hons) MRCGP

Dr Tom Anderson
Clinical Product Lead
MBBS MRCGP

Abby Watts
Senior Nurse Prescriber
BSc Adult Nursing, IP

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Low testosterone, often referred to as “Low T” or hypogonadism, is a medical condition in which the body doesn’t produce enough testosterone, a crucial hormone for maintaining male physical and mental health. Testosterone levels naturally decline with age, but sometimes, they can decrease to a point where it may cause symptoms and health issues.2-8
Clinically low testosterone refers to a specific range of testosterone levels in the blood, which is considered below the normal threshold for a given age. These levels are determined through blood tests and are used by healthcare professionals to diagnose and treat hypogonadism. If levels are below what’s considered normal for the patient's age, treatment options such as TRT are recommended. TRT is a medical treatment that can effectively manage and treat symptoms associated with low testosterone.2-8
You can read more here.
Testosterone supplements are nutritional aids designed to support testosterone levels, whereas TRT is a medically supervised treatment for men diagnosed with low testosterone. TRT involves administering testosterone to restore healthy levels of the hormone and alleviate the symptoms of hypogonadism and is often necessary for those who have significantly low testosterone.
TRT can be administered in several forms, including injections, gels, or tablets. The method of administration will depend on the individual's health profile and lifestyle, as well as the preference and guidance of the healthcare provider. Regular monitoring by a healthcare professional is essential to adjust dosages and ensure the therapy’s effectiveness while minimising side effects.
If you're experiencing symptoms such as fatigue, decreased libido, erectile dysfunction, or other physical and emotional changes, you might have low testosterone.
A blood test is the only reliable way to determine your testosterone levels. If your levels are clinically low, your doctor might recommend TRT as a treatment option to restore normal levels and improve your health and wellbeing.
TRT can significantly improve quality of life by alleviating symptoms of low testosterone. Benefits often include increased energy levels, improved mood, heightened libido, better erectile function, increased muscle mass, and decreased body fat. It’s important to consult with a healthcare professional to discuss the potential benefits and risks based on your specific health condition.2-6
You can read more here.
The effects of TRT can be felt within just a few weeks, but full benefits may take several months to manifest. The timeline can vary depending on the individual's baseline testosterone levels, the form of therapy chosen, and their overall health. Regular follow-up with a healthcare provider is crucial to monitor the therapy's effectiveness and make any necessary adjustments.8
Low testosterone can be a factor that results in ED, if this is the case for you then restoring your Testosterone levels to the normal range may help to alleviate the symptoms of Erectile dysfunction However, if ED persists, additional treatments specifically targeting erectile dysfunction may be needed. Always consult with a healthcare professional to determine the most appropriate treatment for your situation.5
Two blood tests are required to ensure an accurate diagnosis of low testosterone. The initial test provides a preliminary assessment. Since testosterone levels can naturally fluctuate due to various factors, a second blood test confirms these results. This two-step process minimises the risk of false positives and provides a solid basis for any necessary treatment.
You can read more here.
Bernstein JS, Dhingra O. “A phase III, single-arm, 6-month trial of a wide-dose range oral product.” Ther Adv Urol. 2024;16:1-17. 2024; doi: 10.1177/17562872241241864
Araujo AB, Esche GR, Kupelian V, O’Donnell AB, Travison TG, Williams RE, et al. Prevalence of symptomatic androgen deficiency in men. The journal of clinical endocrinology and metabolism. 2007;92(11): 4241–4247.
Layton JB, Li D, Meier CR, Sharpless JL, Stürmer T, Jick SS, et al. Testosterone lab testing and initiation in the United Kingdom and the United States, 2000 to 2011. The journal of clinical endocrinology and metabolism. 2014;99(3): 835–842.
Barbonetti A, D’Andrea S, Francavilla S. Testosterone replacement therapy. Andrology. 2020;8(6): 1551–1566. https://doi.org/10.1111/andr.12774.
Wang C, Jackson G, Jones TH, Matsumoto AM, Nehra A, Perelman MA, et al. Low testosterone associated with obesity and the metabolic syndrome contributes to sexual dysfunction and cardiovascular disease risk in men with type 2 diabetes. Diabetes Care [Internet]. 2011;34(7):1669–75.
Indirli R, Lanzi V, Arosio M, Mantovani G, Ferrante E. The association of hypogonadism with depression and its treatments. Front Endocrinol (Lausanne) [Internet]. 2023;14
Rabijewski M, Papierska L, Kozakowski J, Zgliczyński W. The high prevalence of testosterone deficiency in population of Polish men over 65 years with erectile dysfunctions. Aging Male [Internet]. 2012;15(4):258–62.
Saad F, Aversa A, Isidori AM, Zafalon L, Zitzmann M, Gooren L. Onset of effects of testosterone treatment and time span until maximum effects are achieved. European journal of endocrinology. 2011;165(5): 675–685
Sizar O, Leslie SW, Schwartz J. Male hypogonadism. In: StatPearls. Treasure Island (FL): StatPearls Publishing; 2025.
Experiencing decreased libido, fatigue, or increased body fat? You might have low testosterone. Check if low-T is affecting you today.
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