Benefits of Testosterone Replacement Therapy

Testosterone replacement therapy (TRT) has become an increasingly popular treatment option for men with low testosterone levels. Low testosterone, also known as hypogonadism or “low T,” is a condition where the body does not produce enough of the male sex hormone testosterone. This hormone is crucial for maintaining muscle mass, bone density, libido, and overall well-being. The benefits of TRT are numerous, but the therapy is not without potential side effects and risks. This comprehensive review will outline the benefits of TRT, what patients can expect, and some of the research that supports its use.

The Importance of Testosterone

Testosterone is the primary male sex hormone and plays a critical role in the development and maintenance of several physiological and psychological functions in men. Produced primarily in the testicles, testosterone helps regulate muscle mass, bone density, fat distribution, libido, and sperm production. Additionally, it is essential for mood regulation and cognitive function (Bassil, 2011).

Low Testosterone and Its Effects on Men

The prevalence of low testosterone increases with age, affecting approximately 20% of men over 60, 30% over 70, and 50% over 80 years of age (Araujo et al., 2007). Symptoms of low testosterone may include:

  • Decreased libido
  • Erectile dysfunction
  • Fatigue
  • Reduced muscle mass and strength
  • Decreased bone density
  • Increased body fat
  • Depression
  • Cognitive decline

Testosterone Replacement Therapy: An Overview

Testosterone replacement therapy aims to restore testosterone levels to the normal range, alleviating symptoms associated with low T. TRT is available in various forms, including injections (online testosterone shots), gels, patches, and pellets. The specific treatment method and dosage will depend on the individual’s needs and preferences.

Benefits of Testosterone Replacement Therapy

Improved Sexual Function

One of the most apparent benefits of TRT is improved sexual function. Numerous studies have demonstrated that TRT can significantly improve libido, erectile function, and overall sexual satisfaction (Hackett et al., 2017). A meta-analysis of 17 randomized controlled trials concluded that TRT led to significant improvements in erectile function, sexual desire, and sexual satisfaction compared to placebo (Corona et al., 2014).

Increased Muscle Mass and Strength

TRT has been shown to increase lean body mass and muscle strength in men with low testosterone. A study by Bhasin et al. (1996) found that testosterone therapy resulted in significant increases in muscle size and strength in healthy men, even without an exercise program. In a 12-month, randomized, double-blind, placebo-controlled trial, Snyder et al. (2016) found that TRT improved lean body mass and decreased fat mass in older men with low testosterone levels.

Improved Bone Density

Low testosterone levels have been linked to decreased bone density and an increased risk of osteoporosis in men (Araujo et al., 2008). TRT can help improve bone mineral density (BMD), reducing the risk of fractures. A randomized controlled trial by Amory et al. (2004) demonstrated that testosterone treatment significantly increased BMD in hypogonadal men.

Enhanced Mood and Cognitive Function

Men with low testosterone levels may experience mood swings, irritability, and depression. TRT has been shown to improve mood and alleviate depressive symptoms in hypogonadal men (Almeida et al., 2004). Additionally, a study by Cherrier et al. (2001) found that TRT improved cognitive performance in older men with low testosterone levels.

What to Expect of TRT

Initiation and Monitoring of TRT

Patients considering TRT should undergo a comprehensive evaluation, including a thorough medical history, physical examination, and blood tests to measure testosterone levels. Testosterone levels should be measured in the morning, as they tend to be highest during that time (Brambilla et al., 2009). If low testosterone is confirmed, the healthcare provider will discuss the potential benefits and risks of TRT and determine the most appropriate treatment method.

Duration of Treatment

The duration of TRT will vary depending on the individual’s response to treatment and symptom improvement. Some men may notice improvements in symptoms such as increased energy, mood, and libido within a few weeks, while others may take several months to notice significant changes. Regular follow-up appointments and blood tests will be necessary to monitor treatment progress and adjust the dosage as needed.

Potential Side Effects and Risks

While TRT can offer numerous benefits, it is not without potential side effects and risks. Some common side effects include acne, fluid retention, and increased red blood cell count (Bassil et al., 2009). Additionally, TRT may increase the risk of sleep apnea, blood clots, and prostate enlargement. Although research on the association between TRT and prostate cancer is conflicting, it is generally recommended that men with a history of prostate cancer or those with an elevated risk should exercise caution when considering TRT (Khera et al., 2014).


Testosterone replacement therapy offers numerous benefits for men suffering from low testosterone levels, including improved sexual function, increased muscle mass and strength, enhanced bone density, and better mood and cognitive function. However, it is essential for patients and healthcare providers to carefully weigh the potential benefits and risks before initiating treatment. With proper medical supervision, TRT can significantly improve the quality of life for many men affected by low testosterone.

If you’re experiencing symptoms of hormonal imbalance, and you believe that TRT might be the best treatment for you, don’t hesitate to schedule a consultation with HRT Doctors Group. Our experienced team of hormone specialists can help you achieve hormonal balance and improve your overall quality of life. Contact us today to learn more.

Research Citations

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  • Almeida, O. P., Waterreus, A., & Spry, N. (2004). One year follow-up study of the association between chemical castration, sex hormones, beta-amyloid, memory, and depression in men. Psychoneuroendocrinology, 29(8), 1071-1081.
  • Amory, J. K., Watts, N. B., Easley, K. A., Sutton, P. R., Anawalt, B. D., Matsumoto, A. M., … & Tenover, J. L. (2004). Exogenous testosterone or testosterone with finasteride increases bone mineral density in older men with low serum testosterone. The Journal of Clinical Endocrinology & Metabolism, 89(2), 503-510.
  • Araujo, A. B., Esche, G. R., Kupelian, V., O’Donnell, A. B., Travison, T. G., Williams, R. E., … & McKinlay, J. B. (2007). Prevalence of symptomatic androgen deficiency in men. Journal of Clinical Endocrinology & Metabolism, 92(11), 4241-4247.
  • Araujo, A. B., O’Donnell, A. B., Brambilla, D. J., Simpson, W. B., Longcope, C., Matsumoto, A. M., & McKinlay, J. B. (2008). Prevalence and incidence of androgen deficiency in middle-aged and older men: estimates from the Massachusetts Male Aging Study. Journal of Clinical Endocrinology & Metabolism, 89(12), 5920-5926.
  • Bassil, N. (2011). Late-onset hypogonadism. Medical Clinics of North America, 95(3), 507-523.
  • Bassil, N., Alkaade, S., & Morley, J. E. (2009). The benefits and risks of testosterone replacement therapy: a review. Therapeutics and Clinical Risk Management, 5, 427-448.
  • Bhasin, S., Storer, T. W., Berman, N., Callegari, C., Clevenger, B., Phillips, J., … & Casaburi, R. (1996). The effects of supraphysiologic doses of testosterone on muscle size and strength in normal men. New England Journal of Medicine, 335(1), 1-7.
  • Brambilla, D. J., O’Donnell, A. B., Matsumoto, A. M., & McKinlay, J. B. (2009). Intraindividual variation in levels of serum testosterone and other reproductive and adrenal hormones in men. Clinical Endocrinology, 71(6), 853-862.
  • Cherrier, M. M., Asthana, S., Plymate, S., Baker, L., Matsumoto, A. M., Peskind, E., … & Craft, S. (2001). Testosterone supplementation improves spatial and verbal memory in healthy older men. Neurology, 57(1), 80-88.
  • Corona, G., Isidori, A. M., Buvat, J., Aversa, A., Rastrelli, G., Hackett, G., … & Maggi, M. (2014). Testosterone supplementation and sexual function: a meta-analysis study. Journal of Sexual Medicine, 11(6), 1577-1592.
  • Hackett, G., Heald, A. H., Sinclair, A., Jones, P. W., Strange, R. C., & Ramachandran, S. (2017). Serum testosterone, testosterone replacement therapy and all-cause mortality in men with type 2 diabetes: retrospective consideration of the impact of PDE5 inhibitors and statins. International Journal of Clinical Practice, 71(3), e12916.
  • Khera, M., Crawford, D., Morales, A., Salonia, A., & Morgentaler, A. (2014). A new era of testosterone and prostate cancer: from physiology to clinical implications. European Urology, 65(1), 115-123.
  • Snyder, P. J., Bhasin, S., Cunningham, G. R., Matsumoto, A. M., Stephens-Shields, A. J., Cauley, J. A., … & Ellenberg, S. S. (2016). Effects of testosterone treatment in older men. New England Journal of Medicine, 374(7), 611-624.