Quick answer: Testosterone therapy is a prescription treatment for men with clinically diagnosed low testosterone (hypogonadism), confirmed by blood testing. In men with a genuine deficiency, it is used to relieve specific symptoms. It also carries real risks, including cardiovascular and blood-clotting concerns, and it is not appropriate for boosting performance or reversing normal aging. It requires a physician’s diagnosis and ongoing monitoring.
Testosterone therapy is discussed widely, alongside genuine controversy about its risks. This article explains what it treats, how it is delivered, who is evaluated for it, and what the evidence currently says about both benefits and harms.
What Testosterone Therapy is
Testosterone therapy, also called androgen replacement therapy, raises testosterone levels in men who have a diagnosed deficiency. Testosterone is produced in the testes and helps regulate facial and body hair, sperm production, libido, bone density, red blood cell production, and muscle mass. Some men develop clinically low levels with age or due to medical conditions, and after appropriate testing a physician may consider treatment to bring levels back into the normal range [1].
The goal of therapy is to relieve symptoms attributable to low testosterone, such as reduced libido, erectile difficulty, poor concentration, reduced muscle mass, fatigue, and mood changes. It is also used in specific medical conditions such as delayed puberty and certain cases of osteoporosis or muscle wasting, under specialist care.
Delivery Methods
The delivery method is chosen by the prescriber based on the individual’s needs and the risk profile of each option.
| Method | How it is used | Notes |
|---|---|---|
| Transdermal patch | Applied to the skin daily | May cause skin irritation |
| Topical gel | Applied to the skin daily | Risk of transfer to others by skin contact; requires care |
| Buccal | Placed on the gum twice daily | May cause gum irritation |
| Intramuscular injection | Injected on a schedule set by the prescriber | Common; levels fluctuate between doses |
| Subcutaneous pellet | Implanted under the skin periodically | Requires a minor in-office procedure |
| Oral | Taken by mouth | Availability and suitability vary |
| Intranasal | Applied in the nostrils several times daily | Frequent dosing |
All forms are prescription-only and administered on a schedule set by a physician [3].
Benefits, in Men with a Diagnosed Deficiency
The following are effects reported in men with clinically confirmed low testosterone who are treated and monitored by a physician. They are not general enhancements and do not apply to men with normal testosterone.
In men with diagnosed hypogonadism, treatment has been associated with improvements in muscle mass and strength, bone density, energy, and overall sense of well-being. Some evidence also links treatment with improvement in mood symptoms and in sexual desire and function, specifically in men whose symptoms stem from a deficiency. Individual response varies and is assessed clinically over time.
Risks and Side Effects
Testosterone therapy carries risks that must be weighed against any potential benefit, and these deserve at least as much attention as the benefits above.
Reported risks include an increased risk of blood clots (venous thromboembolism) [5], which can be serious. Cardiovascular safety has been actively studied, with mixed findings, and remains an area of medical debate. Other effects include acne, breast tenderness or enlargement, fluid retention, elevated red blood cell counts, and suppression of sperm production and fertility. The relationship between testosterone therapy and prostate cancer has been studied extensively; a large randomized trial in men with low PSA found no increased prostate cancer incidence over 14 months compared with placebo, but longer-term risk in men with pre-existing prostate disease is less clear, and prostate monitoring remains part of appropriate care [6].
Not everyone experiences these effects, and whether benefits outweigh risks depends entirely on the individual’s diagnosis, symptoms, and medical history, assessed by a physician.
Lifestyle and Supplements
Lifestyle measures and certain nutrients are sometimes discussed alongside testosterone. These are not a medical therapy and are not a substitute for treatment when a genuine deficiency exists.
Correcting a documented deficiency of vitamin D or zinc may support normal testosterone production, and general measures such as regular exercise, adequate sleep, weight management, and reduced alcohol intake support overall hormonal health. Evidence for supplements raising testosterone in men who are not deficient is limited. Discuss any supplement with your prescriber, as some can interact with medications.
Who is Evaluated for Therapy
Candidacy depends on age, medical history, current health, and confirmed test results [4]. Men with persistent symptoms of low testosterone and a confirmed low level on blood testing may be evaluated. Men who have undergone certain cancer treatments or been diagnosed with hypogonadism may also be candidates. The only way to know is a thorough evaluation with a physician, including bloodwork and medical history.
Testosterone therapy is not a treatment for normal aging and not a performance enhancer. For those goals, it is not appropriate.
Frequently asked questions
How is low testosterone diagnosed? With a morning blood test measuring total testosterone, typically confirmed with a second test, alongside symptoms. A fuller assessment may include free testosterone, LH, FSH, SHBG, and estradiol.
Is testosterone therapy safe? It has real risks and is prescription-only for that reason. In appropriately selected, monitored patients it is a recognized treatment; suitability is an individual medical decision.
Will it help if my testosterone is normal? No. Therapy addresses a diagnosed deficiency. It is not an enhancement for men with normal levels.
When to Speak with a Provider
If you have ongoing symptoms such as fatigue, reduced libido, or mood changes, speak with a licensed healthcare provider about whether hormone testing is appropriate for you. Diagnosis and any treatment decision are made with a physician.
Disclaimer
This article is for general information only and, like all content on Gambit’s Health Hub, is not a substitute for professional medical advice, diagnosis, or treatment. Testosterone therapy is a prescription treatment. For any health concern, consult a licensed physician.
References
- Barone B, Napolitano L, Abate M, et al. The role of testosterone in the elderly: what do we know? International Journal of Molecular Sciences. 2022;23(7):3535. PMID: 35408895. doi:10.3390/ijms23073535.
- Mulhall JP, Trost LW, Brannigan RE, et al. Evaluation and management of testosterone deficiency: AUA guideline. Journal of Urology. 2018;200(2):423–432. doi:10.1016/j.juro.2018.03.115. (Amended 2020.)
- Alberti I, Grenier A, Kraus H, Carrara DNR. Pharmaceutical development and clinical effectiveness of a novel gel technology for transdermal drug delivery. Expert Opinion on Drug Delivery. 2005;2(5):935–950.
- Morgentaler A, Khera M, Maggi M, Zitzmann M. Commentary: who is a candidate for testosterone therapy? A synthesis of international expert opinions. Journal of Sexual Medicine. 2014;11(7):1636–1645. doi:10.1111/jsm.12546. PMID: 24797325.
- Walker RF, Zakai NA, MacLehose RF, et al. Association of testosterone therapy with risk of venous thromboembolism among men with and without hypogonadism. JAMA Internal Medicine. 2020;180(2):190–197. doi:10.1001/jamainternmed.2019.5135.
- Bhasin S, Travison TG, Pencina KM, et al. Prostate safety events during testosterone replacement therapy in men with hypogonadism: a randomized clinical trial. JAMA Network Open. 2023;6(12):e2348692. doi:10.1001/jamanetworkopen.2023.48692.
- Snyder PJ, Bhasin S, Cunningham GR, et al. Effects of testosterone treatment in older men. New England Journal of Medicine. 2016;374(7):611–624. PMID: 26886521.
